Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73379aa9d82d7003952666a7b8d9c7add60a2baba36cdee3dc42f48f3d099084' 
  AND token = 'ItCkS8ezxGiVVgvAh3Ezxbb1r5gNhg5GWRfo7HBHz/M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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