| id | select_type | table | type | possible_keys | key | key_len | ref | rows | Extra |
|---|---|---|---|---|---|---|---|---|---|
| 1 | SIMPLE | u0_ | const | PRIMARY, IDX_637D7E5D700047D2 | PRIMARY | 4 | const | 1 | |
| 1 | SIMPLE | u1_ | const | PRIMARY | PRIMARY | 4 | const | 1 | |
| 1 | SIMPLE | u2_ | ref | IDX_B1744733A76ED395 | IDX_B1744733A76ED395 | 5 | const | 1 | |
| 1 | SIMPLE | u3_ | ref | IDX_FE918C8EE2904019 | IDX_FE918C8EE2904019 | 5 | const | 1 |