I am currently stuck with this approch not getting how do i need to minus with current timestamp and find all records which as a difference of 5 minutes or less

**My table **

create table demo ( id number, modified_date timestamp(6) );

insert into demo values(1,to_timestamp('10-MAY-19 07.14.15.066000000 AM','DD-MON-RR HH.MI.SSXFF AM'));   
insert into demo values(5,to_timestamp('10-MAY-19 07.16.11.064000000 AM','DD-MON-RR HH.MI.SSXFF AM'));    
insert into demo values(3,to_timestamp('10-MAY-19 07.15.13.062000000 AM','DD-MON-RR HH.MI.SSXFF AM'));
insert into demo values(12,to_timestamp('10-MAY-19 07.18.10.056000000 AM','DD-MON-RR HH.MI.SSXFF AM'));
insert into demo values(14,to_timestamp('10-MAY-19 07.20.09.046000000 AM','DD-MON-RR HH.MI.SSXFF AM'));

Data in table

id  modified_date 
1   10-MAY-19 07.14.15.066000000 AM
5   10-MAY-19 07.16.11.064000000 AM
3   10-MAY-19 07.15.13.062000000 AM
12  10-MAY-19 07.18.10.056000000 AM
14  10-MAY-19 07.20.09.046000000 AM

My query does not give in minutes

select modified_date - current_timestamp ( in minutes ) as dt from demo;

Expected : Need record as a difference of 5 minutes or less with current_timestamp

id  modified_date                    date_differenence    
1   10-MAY-19 07.14.15.066000000 AM  modified_date - current_timestamp ( in minutes )
5   10-MAY-19 07.16.11.064000000 AM  modified_date - current_timestamp ( in minutes )
3   10-MAY-19 07.15.13.062000000 AM  modified_date - current_timestamp ( in minutes )
12  10-MAY-19 07.18.10.056000000 AM  modified_date - current_timestamp ( in minutes )
14  10-MAY-19 07.20.09.046000000 AM  modified_date - current_timestamp ( in minutes )