Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0a4709183f98bbc2cd56ea24e94072f4e0eee6138d3af55b711c7370eb41f916' 
  AND token = 'Mm8debRHcAllx7BTidF1YfFV0F164mIXAQdNMgtbrdk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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