Explain Query (mysql)
EXPLAIN SELECT COUNT(*) FROM `mp_in_members` WHERE `user_id` = '308842'
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | mp_in_members | ref | user_id | user_id | 4 | const | 1 | 100.00 | Using index |