Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '899dbd26b42ba392cf53c9b06b94ddfb557cf35767ba972ab62ab903b6ecb6e1' 
  AND token = 'bADQtn0W5NXQpAdI999sbayxCr+Qfp2U6jPWAHszGiM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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