Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8911c637cada7821dd6162ce0a206389aff4dfeb259cdcc19c2ca20d946bc43b' 
  AND token = '3BhjnjXD8Tgn43E93bb8TOe5E9HbgheC/LzTkbHAYv4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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