id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	calendar	NULL	index_merge	FK_calendar_website,calendar_confirmStatusIndex	calendar_confirmStatusIndex,FK_calendar_website	2,5	NULL	401	99.92	Using intersect(calendar_confirmStatusIndex,FK_calendar_website); Using where; Using index