Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f545533a716623a9c9d79791d5ef2d89dc7cd1218c071ac6e1eccb54491e94f2' 
  AND token = 'X9qUBDy6cWQ6LMSWWxOd0t8zw1Ly3iT8Oa0bYtA6DHs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00091

JSON explain

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