id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE	cms_content_element	index_merge	content_id_2,tree_id_2,published_at,published_to,active,content_id,tree_id	content_id,active	5,3	NULL	4	Using intersect(content_id,active); Using where; Using temporary; Using filesort
1	SIMPLE	cms_content_element_tree	ref	element_id_2,element_id	element_id_2	4	avalon_www.cms_content_element.id	1	Using where; Using index