Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d26993417caa3f23eec17f2a6d8f64f09a61bc1d49c9b6afdfe3eb670cbf942' 
  AND token = 'JFOZmBudBNPyBVIm488g9kmPeBgAYsVwl6dKWGcXQBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}