Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb729068ecda94480f7b4585afcc60e2cc320234a24619fc7871187cbbeb1a5c' 
  AND token = 'R+NbS0j1Kzc00drZd/mVLyUDsPYwl7CyxXpT2j+DsWU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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