explain SELECT * FROM cms_mail_queue WHERE sent_time IS NULL AND try_sent < 25 AND time_to_send <= '2011-10-13 15:06:27' ORDER BY time_to_send LIMIT 0, 10;
ERROR 2006 (HY000): MySQL server has gone away
No connection. Trying to reconnect...
Connection id:    140166
Current database: kolalwat_cms

+----+-------------+-----------------+-------+---------------+--------------+---------+------+-------+-------------+
| id | select_type | table           | type  | possible_keys | key          | key_len | ref  | rows  | Extra       |
+----+-------------+-----------------+-------+---------------+--------------+---------+------+-------+-------------+
|  1 | SIMPLE      | cms_mail_queue | range | time_to_send  | time_to_send | 8       | NULL | 64991 | Using where |
+----+-------------+-----------------+-------+---------------+--------------+---------+------+-------+-------------+
1 row in set (0.02 sec)