Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c1022b60b77e502b8ea436ca9c64e13398462c1224dcb9deeec52bcda67bb81' 
  AND token = 'pphw/iaoTBJx9ryC+RZTjgk73IepQ7AKwfV7wpDo05k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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