SELECT 
  cscart_shippings.shipping_id, 
  cscart_shipping_descriptions.shipping, 
  cscart_shipping_descriptions.delivery_time, 
  cscart_shipping_descriptions.description, 
  cscart_shippings.rate_calculation, 
  cscart_shippings.service_params, 
  cscart_shippings.destination, 
  cscart_shippings.min_weight, 
  cscart_shippings.max_weight, 
  cscart_shippings.service_id, 
  cscart_shippings.free_shipping, 
  cscart_shipping_services.module, 
  cscart_shipping_services.code as service_code, 
  cscart_shippings.is_address_required 
FROM 
  cscart_shippings 
  LEFT JOIN cscart_shipping_descriptions ON cscart_shippings.shipping_id = cscart_shipping_descriptions.shipping_id 
  LEFT JOIN cscart_shipping_services ON cscart_shipping_services.service_id = cscart_shippings.service_id 
  LEFT JOIN cscart_storefronts_shippings AS storefronts_shippings ON storefronts_shippings.shipping_id = cscart_shippings.shipping_id 
WHERE 
  cscart_shippings.status = 'A' 
  AND cscart_shippings.shipping_id IN (37, 34) 
  AND (
    cscart_shippings.min_weight <= 0.001 
    AND (
      cscart_shippings.max_weight >= 0.001 
      OR cscart_shippings.max_weight = 0.00
    )
  ) 
  AND cscart_shipping_descriptions.lang_code = 'ja' 
  AND (
    cscart_shippings.usergroup_ids = '' 
    OR FIND_IN_SET(
      0, cscart_shippings.usergroup_ids
    ) 
    OR FIND_IN_SET(
      1, cscart_shippings.usergroup_ids
    )
  ) 
  AND (
    storefronts_shippings.storefront_id = 2 
    OR storefronts_shippings.storefront_id IS NULL
  ) 
ORDER BY 
  cscart_shippings.position

Query time 0.00074

JSON explain

{
  "query_block": {
    "select_id": 1,
    "filesort": {
      "sort_key": "cscart_shippings.position",
      "temporary_table": {
        "table": {
          "table_name": "cscart_shippings",
          "access_type": "range",
          "possible_keys": ["shipping_id", "c_status"],
          "key": "shipping_id",
          "key_length": "3",
          "used_key_parts": ["shipping_id"],
          "rows": 2,
          "filtered": 100,
          "index_condition": "cscart_shippings.shipping_id in (37,34)",
          "attached_condition": "cscart_shippings.`status` = 'A' and cscart_shippings.min_weight <= 0.001 and (cscart_shippings.max_weight >= 0.001 or cscart_shippings.max_weight = 0.00) and (cscart_shippings.usergroup_ids = '' or find_in_set(0,cscart_shippings.usergroup_ids) or find_in_set(1,cscart_shippings.usergroup_ids))"
        },
        "table": {
          "table_name": "cscart_shipping_descriptions",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "9",
          "used_key_parts": ["shipping_id", "lang_code"],
          "ref": ["cscart_purchase_fl_com.cscart_shippings.shipping_id", "const"],
          "rows": 1,
          "filtered": 100,
          "index_condition": "cscart_shipping_descriptions.lang_code = 'ja'"
        },
        "table": {
          "table_name": "cscart_shipping_services",
          "access_type": "eq_ref",
          "possible_keys": ["PRIMARY", "sa"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["service_id"],
          "ref": ["cscart_purchase_fl_com.cscart_shippings.service_id"],
          "rows": 1,
          "filtered": 100
        },
        "block-nl-join": {
          "table": {
            "table_name": "storefronts_shippings",
            "access_type": "index",
            "key": "PRIMARY",
            "key_length": "8",
            "used_key_parts": ["storefront_id", "shipping_id"],
            "rows": 16,
            "filtered": 100,
            "using_index": true
          },
          "buffer_type": "flat",
          "buffer_size": "27Kb",
          "join_type": "BNL",
          "attached_condition": "trigcond(storefronts_shippings.storefront_id = 2 or storefronts_shippings.storefront_id is null) and trigcond(storefronts_shippings.shipping_id = cscart_shippings.shipping_id)"
        }
      }
    }
  }
}