Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '84916e471e551d3670cd244b8f042588a5539617502f803dafac56e2819065ba' 
  AND token = '8tGX7zDQg7WtQaenXKJfHNOiTRI2OZRg6Zu2/0Smgi8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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