I am asking this  by curiosity. This could be the most stupid question or basic question. Forgive me if it is..

 Suppose I have a isThatA table contains id, class, school_id having 1000 records.

 there are 3 schools and 12 classes.

Which of these 2 queries would be faster(if there is a difference) 

Query 1: SELECT * FROM isThatA WHERE school=2 and class=5; 

Query 2: SELECT * FROM isThatA WHERE class=5 and school=2;

Note: I just changed the places of the 2 conditions in WHERE

Also probable number of records for condition WHERE school=2 is 333

and probable number of records for condition WHERE class=5 is 80.