MYSQL查询花费了太多时间和时间

Question

我正在尝试调试MYSQL查询，因为它在一台服务器上花费大约4-5分钟，而在另一台MYSQL服务器上则失败。

查询是这样的：

SELECT 
        *, 
        TM.tutor_id as tutor_id, 
        TIMESTAMPDIFF( YEAR, birthdate, CURDATE( ) ) AS age 
    from 
        tutor_master as TM 
            LEFT JOIN category_master as CM 
                on TM.category = CM.category_id
            LEFT JOIN tutor_expected_rate TER 
                ON FIND_IN_SET( TER.tutor_id, TM.tutor_id ) > 0 
            LEFT JOIN admin_shortlist_master SHM 
                ON TM.tutor_id = SHM.tutor_id 
                AND (SHM.user_auth_id = 'c84258e9c39059a89ab77d846ddab909') 
            INNER JOIN level_master LM 
                ON FIND_IN_SET(LM.level_id, TER.level_id) > 0 
    WHERE 
        1=1 
    GROUP BY 
        TM.tutor_id 
    order by 
        TM.is_priority DESC, 
        TM.tutor_id DESC 
    LIMIT 
        0, 10

和MYSQL解释结果是这样的：

1   SIMPLE  TM      NULL    ALL     PRIMARY,tutor_id    NULL    NULL    NULL    27530   100.00  Using temporary; Using filesort
1   SIMPLE  SHM     NULL    ref     tutor_id,user_auth_id   user_auth_id    257     const   1   100.00  Using where
1   SIMPLE  CM      NULL    eq_ref  PRIMARY     PRIMARY     4   toprecru_portal_db.TM.category  1   100.00  NULL
1   SIMPLE  LM      NULL    ALL     NULL    NULL    NULL    NULL    11  100.00  Using join buffer (Block Nested Loop)
1   SIMPLE  TER     NULL    ALL     NULL    NULL    NULL    NULL    13223   100.00  Using where; Using join buffer (Block Nested Loop)

现在我的问题是，它有任何明显的错误，我忽略了使查询更有效率。 感谢。