Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf8f44c44b98cabb5bbac41e0660b525fd9d7f9f18cf1fb5baba643cb512fbc3' 
  AND token = 'i202/qXZbT04PU5jMcu/U0BgjDvcnjcOIQFVDv8xdYU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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