SELECT 
  q_product_filters.filter_id 
FROM 
  q_product_features_values 
  LEFT JOIN q_products as products ON products.product_id = q_product_features_values.product_id 
  LEFT JOIN q_product_filters ON q_product_filters.feature_id = q_product_features_values.feature_id 
  LEFT JOIN q_product_features ON q_product_features.feature_id = q_product_features_values.feature_id 
  LEFT JOIN q_product_options_inventory as inventory ON inventory.product_id = products.product_id 
  LEFT JOIN q_companies AS companies ON companies.company_id = products.company_id 
  INNER JOIN q_products_categories as products_categories ON products_categories.product_id = products.product_id 
  INNER JOIN q_categories ON q_categories.category_id = products_categories.category_id 
  AND (
    q_categories.usergroup_ids = '' 
    OR FIND_IN_SET(0, q_categories.usergroup_ids) 
    OR FIND_IN_SET(1, q_categories.usergroup_ids)
  ) 
  AND q_categories.status IN ('A', 'H') 
WHERE 
  q_product_filters.filter_id IN (1, 3) 
  AND q_product_features_values.feature_id IN (2) 
  AND q_product_features_values.value = 'Y' 
  AND q_product_features_values.lang_code = 'en' 
  AND q_categories.category_id IN (
    12, 13, 14, 29, 40, 45, 51, 52, 69, 78, 85, 
    93, 96, 293, 564, 608, 15, 30, 41, 46, 
    50, 53, 68, 70, 79, 92, 97, 294, 609, 16, 
    31, 38, 42, 47, 54, 71, 77, 80, 87, 91, 
    94, 98, 295, 17, 32, 43, 44, 48, 55, 72, 
    81, 84, 88, 95, 99, 296, 597, 605, 18, 
    33, 49, 56, 73, 82, 83, 89, 297, 555, 607, 
    19, 34, 57, 74, 90, 298, 582, 600, 20, 
    35, 58, 75, 205, 604, 21, 37, 59, 76, 601, 
    22, 60, 23, 66, 24, 613, 25, 26, 27, 28, 
    36
  ) 
  AND companies.status = 'A' 
  AND products.company_id = 34 
  AND (
    CASE products.tracking WHEN 'O' THEN inventory.amount > 0 WHEN 'B' THEN products.amount > 0 ELSE 1 END
  ) 
  AND (
    products.usergroup_ids = '' 
    OR FIND_IN_SET(0, products.usergroup_ids) 
    OR FIND_IN_SET(1, products.usergroup_ids)
  ) 
  AND products.status IN ('A') 
  AND products.company_id = 34 
  AND q_product_features.feature_type = 'C' 
GROUP BY 
  q_product_features_values.feature_id

Query time 0.00469

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "Impossible WHERE noticed after reading const tables"
  }
}