SELECT id_category FROM wrs_category_lang
WHERE id_lang = 5
AND name = keyword1, keyword2 with spaces, keyword3;

SELECT id_category
FROM wrs_category_lang
WHERE id_lang = 5
AND name IN ('keyword1', 'keyword2 with spaces', 'keyword3');

SELECT id_category
FROM wrs_category_lang
WHERE id_lang = 5 AND name IN('keyword1','keyword2'...);