id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	article_cat	NULL	ALL	idx-article_cat-find,qq	NULL	NULL	NULL	1139	0.09	Using where; Using filesort
1	SIMPLE	article_cat_lang	NULL	eq_ref	PRIMARY,fk_article_cat_lang_lang	PRIMARY	8	tempreklpl_db.article_cat.id_article_cat,const	1	100.00	NULL