SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2e2d80b3d67f1d40327a6f60d6c77f724af61833c2ddacebf62369f8b148079a' 
  AND token = 'EG3ZnmaDOq/Myu+4lg90G3Dl7tqnrEE6015Ggh61NwU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

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