Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de8a03392d2a943443180809bf81e3d2b30c9652f20fd89a3a19492108178e67' 
  AND token = 'mXb26j+hGL5DbzLXvBtbb+H6zeyge6U03PeiqNUVAak=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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