Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd907aadd114117ac8375c533fe0f1c46eb96da6497e8bf4c29ed2bb695b80fd1' 
  AND token = 'Tmso6uOi2hS+hUQMdnkCIHvWIzXGdgejKdRXRXonr94=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

Explain
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	SIMPLE								Impossible WHERE noticed after reading const tables