Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9452ac63cd2e7e991853942fba15e5122ab5c2183ef400cf38a17581d94c6969' 
  AND token = 'm+IR9uO69ROa0cwCpGt2q10dt9xflTu9006E1VZQUBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

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