SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf7527fa55da3a3c2a32dc998dc546dc056936dc027dff5111df2a9a0e03e942' 
  AND token = 'jzhirZOf3PzrpORweKWpwW6yT4B/tdzPkPDxe/Zdrws=' 
  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