Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '464571b79d0a59565f4bf2eeb5bf4d45760cf479cc74810fdc62402f16feb1e0' 
  AND token = 'xU/2Aut9eihNQZ8AiFnskGfgEZH8Em6mrwzcjb00oa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

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