Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '23cd83ef73acbb58ff42dd4d9d6afe7f7357ed110ff954dcb428bd8adfae68b5' 
  AND token = 'gey5dcg7NYjDbMaJJk3dlGu9vWTcUn91flGhQa18zL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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