Magento 2 product collection Filtering multi-select attribute values

 If you have multi-select attribute of product like below

If you want filter value for this option Use below syntax to get product data:

->addAttributeToFilter('store_model', array('finset' => $params['store_model']))

finset key is used for multiselect attribute filter.

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();

$products = $objectManager->get('Magento\Catalog\Model\Product')

        ->getCollection()

        ->addAttributeToSelect('*')

        ->addAttributeToSelect('store_brand')

        ->addAttributeToSelect('store_model')

        ->addAttributeToSelect('store_year')

        ->addAttributeToFilter('store_brand', array('finset' => $params['store_brand']))

        ->addAttributeToFilter('store_model', array('finset' => $params['store_model']))

        ->addAttributeToFilter('store_year', array('finset' => $params['store_year']))

        ->addAttributeToFilter('status', array('eq' => \Magento\Catalog\Model\Product\Attribute\Source\Status::STATUS_ENABLED))

        ->setFlag('has_stock_status_filter', false)

        ->joinField('stock_item', 'cataloginventory_stock_item', 'is_in_stock', 'product_id=entity_id', 'is_in_stock=1')

        ->addCategoriesFilter(array('eq' => 296));

same like mysql if you have one value find in array of data you will FIND_IN_SET like here we use finset

SELECT * FROM `catalog_product_entity_varchar` WHERE FIND_IN_SET(5680,value) AND entity_id = 29162 AND attribute_id=183

if this post useful pls comment 

Thank you