SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '35b7ec40f1d6c642e68f87887d3dcf71f93cf389d3d9851839b635912d420294' 
  AND token = 'kiJi9BCOTAumoBuy9qdHoxz2XK2ZwJtBbfTiMXpLn+4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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