Query Keeps return data if Match or doesn't match id

Query Keeps return data if Match or doesn't match id

// Api.php
Route::get('/products/category/{category}','ProductController@productsCategory');

 public function ProductsCategory($id)
    {
        $products = Product::where('category_id', $id)
                    ->where('price_before','!=',0)
                    ->orWhere('price_after','!=',0)
                    ->paginate(10);

        return ProductCollect::collection($products);

    }

If i write in broswer 
--------------------------
http://127.0.0.1:8000/api/products/category/5

return products of category_id 5  // works 

But If i wrote 4 or 3 or 2 or what ever in broswer link  Keep Return the same data of category_id 5

What i Did

php artisan config:clear
php artisan cache:clear
php artisan route:clear
php artisan view:clear