Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'baa672dc5dab18b053c20c7ad42440118d5424b23070369460722542111ea433' 
  AND token = 'C6+hIYBLbSC71zP+3RtWyf/GEyr1dCcQrRzOzAMBIzk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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