使用日期范围和连接优化MySQL查询

I have the following query:

我有以下查询:

SELECT COUNT(*)
  FROM datum d

  JOIN datum_type dt
    ON dt.datum_id = d.id
   AND dt.type_id = '3' 

 WHERE d.added_time >=  DATE_FORMAT(CURDATE(), '%Y-%m')
   AND d.added_time <   DATE_FORMAT(CURDATE() + INTERVAL 1 MONTH, '%Y-%m')
SELECT