id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
2	SUBQUERY	tournament_stage_games	NULL	ref	fk_tournament_stage_games_tournament_id	fk_tournament_stage_games_tournament_id	5	const	19	90	Using where