id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	img	index_merge	shop_product_images,cover	shop_product_images,cover	4,2	NULL	1	Using intersect(shop_product_images,cover); Using where
1	SIMPLE	attr	ref	shop_product_images_attributes3,inx_shop_product_images_attributes_image_id	shop_product_images_attributes3	4	lurex.img.id	1	NULL
1	SIMPLE	image_lang	ref	owner_id	owner_id	5	lurex.img.id	1	NULL