Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3c9b1ab39763cb79acf68950a88f471b43dafd986844240178d215c2a1b1dfd6' 
  AND token = '5NP1LI9nwUIl1ZkHnPy7snauNp007Ft589K6wF01Mns=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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