Slave_IO_State: Waiting for master to send event
                  Master_Host: 95.213.153.162
                  Master_User: repl
                  Master_Port: 3306
                Connect_Retry: 60
              Master_Log_File: mysql-bin.000262
          Read_Master_Log_Pos: 21227409
               Relay_Log_File: mysqld-relay-bin.000738
                Relay_Log_Pos: 52442916
        Relay_Master_Log_File: mysql-bin.000247
             Slave_IO_Running: Yes
            Slave_SQL_Running: Yes
              Replicate_Do_DB:
          Replicate_Ignore_DB:
           Replicate_Do_Table:
       Replicate_Ignore_Table:
      Replicate_Wild_Do_Table:
  Replicate_Wild_Ignore_Table:
                   Last_Errno: 0
                   Last_Error:
                 Skip_Counter: 0
          Exec_Master_Log_Pos: 52442770
              Relay_Log_Space: 1594779963
              Until_Condition: None
               Until_Log_File:
                Until_Log_Pos: 0
           Master_SSL_Allowed: No
           Master_SSL_CA_File:
           Master_SSL_CA_Path:
              Master_SSL_Cert:
            Master_SSL_Cipher:
               Master_SSL_Key:
        Seconds_Behind_Master: 185511
Master_SSL_Verify_Server_Cert: No
                Last_IO_Errno: 0
                Last_IO_Error:
               Last_SQL_Errno: 0
               Last_SQL_Error:
  Replicate_Ignore_Server_Ids:
             Master_Server_Id: 1

SELECT COUNT(*) FROM table1

select *  FROM `table1` WHERE f1 IN (SELECT id FROM table2 WHERE f2 = '157170');

+----+--------------------+---------------+-----------------+---------------------+---------+---------+------+---------+-------------+
| id | select_type        | table         | type            | possible_keys       | key     | key_len | ref  | rows    | Extra       |
+----+--------------------+---------------+-----------------+---------------------+---------+---------+------+---------+-------------+
|  1 | PRIMARY            | table1 | ALL             | NULL                | NULL    | NULL    | NULL | 1920485 | Using where |
|  2 | DEPENDENT SUBQUERY | table2        | unique_subquery | PRIMARY,f2 | PRIMARY | 4       | func |       1 | Using where |
+----+--------------------+---------------+-----------------+---------------------+---------+---------+------+---------+-------------+

+----+-------------+-------+------+---------------------+-------------+---------+------------+------+-------+
| id | select_type | table | type | possible_keys       | key         | key_len | ref        | rows | Extra |
+----+-------------+-------+------+---------------------+-------------+---------+------------+------+-------+
|  1 | SIMPLE      | l     | ref  | PRIMARY,f2 | f2 | 4       | const      |   14 |       |
|  1 | SIMPLE      | ls    | ref  | PRIMARY,f1   | f1   | 4       | table2.id |  135 |       |
+----+-------------+-------+------+---------------------+-------------+---------+------------+------+-------+

IN (SELECT ... )