Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'caf74ce2170d2ab1743ff219af0d99a5afb69346e8e5e9f7dc0dfb045a326f25' 
  AND token = 'KlHHdN1Rxm0K9XM8PH5Oh+ILIWXjgM5+C89A2hVCVaI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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