MariaDB [test]> create table t1 (a int, b int) engine=MyISAM;
Query OK, 0 rows affected (0.24 sec)

MariaDB [test]> explain select * from t1;
+------+-------------+-------+--------+---------------+------+---------+------+------+---------------------+
| id   | select_type | table | type   | possible_keys | key  | key_len | ref  | rows | Extra               |
+------+-------------+-------+--------+---------------+------+---------+------+------+---------------------+
|    1 | SIMPLE      | t1    | system | NULL          | NULL | NULL    | NULL |    0 | const row not found |
+------+-------------+-------+--------+---------------+------+---------+------+------+---------------------+
1 row in set (0.00 sec)

MariaDB [test]> analyze select * from t1;
+------+-------------+-------+------+---------------+------+---------+------+------+--------+----------+------------+--------------------------------+
| id   | select_type | table | type | possible_keys | key  | key_len | ref  | rows | r_rows | filtered | r_filtered | Extra                          |
+------+-------------+-------+------+---------------+------+---------+------+------+--------+----------+------------+--------------------------------+
|    1 | SIMPLE      | NULL  | NULL | NULL          | NULL | NULL    | NULL | NULL |   NULL |     NULL |       NULL | no matching row in const table |
+------+-------------+-------+------+---------------+------+---------+------+------+--------+----------+------------+--------------------------------+
1 row in set (0.01 sec)