Re: combine this 2 simple querys into 1 query for performance.

[Rick James]

Can there be gaps in the ids?
If not, you can find the MAX(id), do some arithmetic, and a UNION:
SELECT @max := MAX(id) FROM tbl;
SELECT ... WHERE id >= @start ORDER BY id
UNION ALL
SELECT ... WHERE id < @start + @count - @max ORDER BY id

Whether or not there are gaps, this _might_ work:
(
SELECT ... WHERE id >= @start ORDER BY id
UNION ALL
SELECT ... WHERE ORDER BY id
) LIMIT 5
Added bonus: It should work even if it does not wrap.