id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	article_cat	NULL	range	PRIMARY,idx-article_cat-find,qq	idx-article_cat-find	5	NULL	139	0.11	Using index condition; Using where
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	10.00	Using where