MySQL 8.0

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create table cursortable( id varchar(10), date date, time time);
insert into cursortable values('68' , '2017-10-28' , '22:00:00');
insert into cursortable values('d3' , '2017-11-03' ,  null);
insert into cursortable values('dd' , '2017-11-03' , '21:45:00');
insert into cursortable values('62' , '2017-11-04' , '14:00:00');
insert into cursortable values('a1' , '2017-11-04' , '19:40:00');
select *,row_number()over(order by date,time,id)rn from cursortable


id
date
time
rn


68
2017-10-28
22:00:00
1

d3
2017-11-03
null
2

dd
2017-11-03
21:45:00
3

62
2017-11-04
14:00:00
4

a1
2017-11-04
19:40:00
5


with cte as
(
  select *,row_number()over(order by date,time,id)rn from cursortable
)
select * from cte where rn<3


id
date
time
rn


68
2017-10-28
22:00:00
1

d3
2017-11-03
null
2


with cte as
(
  select *,row_number()over(order by date,time,id)rn from cursortable
)
,cte2 as
(
  select * from cte where id='dd' and date=  '2017-11-03' and time= '21:45:00'
)
select cte.id,cte.date,cte.time from cte inner join cte2 on cte.rn<cte2.rn


id
date
time


68
2017-10-28
22:00:00

d3
2017-11-03
null

id	date	time	rn
68	2017-10-28	22:00:00	1
d3	2017-11-03	null	2
dd	2017-11-03	21:45:00	3
62	2017-11-04	14:00:00	4
a1	2017-11-04	19:40:00	5