On SQL Server, query B performs hundreds of times faster than query A. There are only 12 partitions in total. How to make query B as simple as query A but keep the performance?

Relevant SQL:

CREATE PARTITION FUNCTION PartitionFunction ( bigint )
AS RANGE RIGHT
FOR VALUES ( 
2401010000000000000,
2402010000000000000,
2403010000000000000,
2404010000000000000,
2405010000000000000,
2406010000000000000,
2407010000000000000,
2408010000000000000,
2409010000000000000,
2410010000000000000,
2411010000000000000,
2412010000000000000
)

CREATE PARTITION SCHEME PartitionScheme
AS PARTITION PartitionFunction 
ALL TO ([PRIMARY])

CREATE TABLE [dbo].[EmailIdx](
    [Email] [varchar](255) NOT NULL,
    [DateAndTime] [bigint] NOT NULL,
    [Serial] [bigint] NOT NULL,
 CONSTRAINT [PK_Email] PRIMARY KEY CLUSTERED 
(
    [Email] ASC,
    [DateAndTime] ASC,
    [Serial] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON, OPTIMIZE_FOR_SEQUENTIAL_KEY = OFF)
)
GO

Query A:

SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

Query B:

-- Union all partitions from February to December starting from December
WITH CombinedResults AS (
    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 12
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL

        SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 11
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 10
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 9
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 12
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 8
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 7
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 6
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 5
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 4
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 3
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC

    UNION ALL    SELECT TOP 20
        Email,
        DateAndTime,
        Serial
    FROM 
        EmailIdx WITH (NOLOCK)
    WHERE
        $PARTITION.PartitionFunction(DateAndTime) = 2
        AND Email = '[email protected]'
        AND DateAndTime < 2412230000000000000
    AND DateAndTime > 2402110000000000000 
    ORDER BY 
        DateAndTime DESC
)
SELECT TOP 20
    Email,
    DateAndTime,
    Serial
FROM 
    CombinedResults

Both queries return the correct results but the first one runs a very inefficient query plan that seems to miss the point that all dates in December partitions will be > November partition, etc, etc.