Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cde2561bc5988211bbb8fd27695a1c8f1b7b8c1849eb0868d429f23da6a8a046' 
  AND token = 'snrnuTnTpjvg74HfiYhqlYIOyjg7omjrT8M5TB7QX40=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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