Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd5c1b3872b5e60870ad8d104b3ecfaf4bc7a8a77e42b310e53ea4caf0bde34f' 
  AND token = 'M80yVxX/EGffk40we9UjXS2fFW+j4g6KL+gmQPPy5hI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}