Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e0246b5d3d95fd0a1a4da7264e4fbe665a04a0ff9951a70b0fa775de84d04a81' 
  AND token = 'C4It+RU46MY+R82WisWduo3MiNvvrUSvlIgoUndlfoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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