WHERE子句中的条件顺序是否会影响MySQL性能？

Question

假设我有一个漫长而昂贵的查询，它满足条件，搜索大量的行。我还有一个特殊的条件，比如公司ID，它会限制需要搜索的行数，从而缩小到数十万。

它使MySQL的性能有什么区别我是否做到这一点：

SELECT * FROM clients WHERE 
     (firstname LIKE :foo OR lastname LIKE :foo OR phone LIKE :foo) AND 
     (firstname LIKE :bar OR lastname LIKE :bar OR phone LIKE :bar) AND 
     company = :ugh 

或本：

SELECT * FROM clients WHERE 
     company = :ugh AND 
     (firstname LIKE :foo OR lastname LIKE :foo OR phone LIKE :foo) AND 
     (firstname LIKE :bar OR lastname LIKE :bar OR phone LIKE :bar)