$products->join('product_attributes as pa' . $attribute, function ($join) use ($attribute) {
   $join->on('pa' . $attribute . '.product_id', '=', 'products.id');
});

$products->where(function ($query) use ($attribute, $option) {
    $query->where('pa1.attribute_id', '=', 1);
    $query->where('pa1.attribute_option_id23', '=', 1);
});

$products->where(function ($query) use ($attribute, $option) {
    $query->where(function ($query) use ($attribute, $option) {
        $query->where('pa3.attribute_id', '=', 3);
        $query->where('pa3.attribute_option_id', '=', 5);
    });

    $query->orWhere(function ($query) use ($attribute, $option) {
        $query->where('pa3.attribute_id', '=', 3);
        $query->where('pa3.attribute_option_id', '=', 6);
    });
    
});