Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc9a26b6b08768ab3efc62cf4125b3507cdc7d75f77b434fbbe6aab1a1376145' 
  AND token = 'NKFOlciT/IPaYArUt7ZcSDdC40GUry1Riif3sWNpn58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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