mysql多列 in多個字段優化sql語句

sql語句，例：

select a,b 
from test 
where (a = 1 and b = 2) 
   or (a = 3 and b = 4) 
   or (a = 5 and b = 6) 
   or (a = 9 and b = 10);

優化后：

select a,b from test where (a,b) in ((1,2),(3,4),(5,6),(9,10));