id	select_type	table	partitions	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	SIMPLE	upload_file	NULL	ref	PRIMARY,idx-upload_file-attribute,fk-upload_file-attribute	idx-upload_file-attribute	14	const,const	1	5.00	Using where
1	SIMPLE	upload_file_lang	NULL	eq_ref	PRIMARY,fk_upload_file_lang_lang	PRIMARY	12	tempreklpl_db.upload_file.id_upload_file,const	1	10.00	Using where