id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	shop_document	ref	PRIMARY,state_user,state_session	state_session	773	const,const	1	Using where; Using index
1	SIMPLE	shop_document_content	ref	shop_document_content,inx_shop_document_content_d_id	shop_document_content	4	lurex.shop_document.id	1	NULL