Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '50cefc8dcbce6275f256ac383f944c1c43467824c82c776d1a5c6055077b9f36' 
  AND token = '/RxTwDUiAP9Q+GTcvJH64Hs0iJ9PuzeN9TE8BZY2YLI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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