Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9c032ed3500fb547de8ebec6fc227d41aad6330b8975a0517d9e0b16995be48d' 
  AND token = '8szUUR2sNm1fOdRGpHcmrnKAqYtYX+b7c+rMEPPa+Cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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