Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12673ab0c19fcc63e0ab70e0e27caff28abfdf14970008333cf3931151d3ca25' 
  AND token = 'KkgosW68NXmJZYzqlsmuHrQ5A5cMNznXlBGWRCzgXcM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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