mysql> INSERT INTO `mysql`.`user` (`Host` ,`User` ,`Password`) VALUES ('localhost', 'usuario', SHA1( 'password' ));
Query OK, 1 row affected, 3 warnings (0.00 sec)
mysql> GRANT SELECT ON base de datos.* TO 'usuario'@'localhost';
ERROR 1133 (42000): Can't find any matching row in the user table