SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    39124, 66758, 65547, 39922, 69901, 67036, 
    65175, 65171
  )

Query time 0.00056

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "5.17"
    },
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "idx_products_inventory"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 8,
      "rows_produced_per_join": 8,
      "filtered": "100.00",
      "cost_info": {
        "read_cost": "4.37",
        "eval_cost": "0.80",
        "prefix_cost": "5.17",
        "data_read_per_join": "41K"
      },
      "used_columns": [
        "product_id",
        "kl_erp_inventory_id",
        "product_code",
        "hsn_code",
        "product_type",
        "status",
        "company_id",
        "list_price",
        "amount",
        "kl_enable_qc",
        "kl_qc_amount",
        "weight",
        "length",
        "width",
        "height",
        "shipping_freight",
        "low_avail_limit",
        "timestamp",
        "updated_timestamp",
        "usergroup_ids",
        "is_edp",
        "edp_shipping",
        "unlimited_download",
        "tracking",
        "free_shipping",
        "zero_price_action",
        "is_pbp",
        "is_op",
        "is_oper",
        "is_returnable",
        "return_period",
        "avail_since",
        "out_of_stock_actions",
        "localization",
        "min_qty",
        "max_qty",
        "qty_step",
        "list_qty_count",
        "tax_ids",
        "age_verification",
        "age_limit",
        "options_type",
        "exceptions_type",
        "details_layout",
        "shipping_params",
        "facebook_obj_type",
        "parent_product_id",
        "buy_now_url",
        "is_stock_split_by_warehouses",
        "master_product_id",
        "master_product_status",
        "master_product_offers_count",
        "youtube_link",
        "show_youtube_video",
        "replace_main_image",
        "position_youtube",
        "restrict_cod",
        "seo_content"
      ],
      "attached_condition": "(`cscart_db`.`cscart_products`.`product_id` in (39124,66758,65547,39922,69901,67036,65175,65171))"
    }
  }
}

Result

product_id kl_erp_inventory_id product_code hsn_code product_type status company_id list_price amount kl_enable_qc kl_qc_amount weight length width height shipping_freight low_avail_limit timestamp updated_timestamp usergroup_ids is_edp edp_shipping unlimited_download tracking free_shipping zero_price_action is_pbp is_op is_oper is_returnable return_period avail_since out_of_stock_actions localization min_qty max_qty qty_step list_qty_count tax_ids age_verification age_limit options_type exceptions_type details_layout shipping_params facebook_obj_type parent_product_id buy_now_url is_stock_split_by_warehouses master_product_id master_product_status master_product_offers_count youtube_link show_youtube_video replace_main_image position_youtube restrict_cod seo_content
39124 IUKCCCOMin 3304 P A 13 700.00 274 0 0 0.000 0 0 0 0.00 0 1730275888 1772692240 0 N N N B N R Y N N Y 10 0 N 0 5 0 0 13 N 0 P F default a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0 N 0 A 0 Y N
39922 MPL100196 809080826195 33049990 P A 13 1680.00 132 0 0 0.000 0 0 0 0.00 0 1732697657 1773383333 0 N N N B N R Y N N Y 10 0 N 0 5 0 0 13 N 0 P F default a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0 N 0 A 0 Y N
65171 90200030 21069099 P A 13 1069.00 13 0 0 170.000 0 0 0 0.00 0 1739269164 1774509735 0 N N N B N R Y N N Y 10 0 N 0 0 0 0 13 N 0 P F default a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0 N 0 A 0 Y N
65175 90200172 21069099 P A 13 619.00 6 0 0 80.000 0 0 0 0.00 0 1739269164 1772692240 0 N N N B N R Y N N Y 10 0 N 0 0 0 0 11 N 0 P F default a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0 N 0 A 0 Y N
65547 MPL100086 8809727051843 33049990 P A 13 2390.00 262 0 0 0.000 0 0 0 0.00 0 1741596817 1773383385 0 N N N B N R Y N N Y 10 0 N 0 0 0 0 13 N 0 P F default a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0 N 0 A 0 Y N
66758 TIR022M 3304 P A 13 1200.00 206 0 0 0.000 0 0 0 0.00 0 1746100503 1772692240 0 N N N B N R Y N N Y 10 0 N 0 0 0 0 13 N 0 P F default a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0 N 0 A 0 Y N
67036 Skinfood01 3304 P A 13 1990.00 31 0 0 0.000 0 0 0 0.00 0 1748520646 1772692240 0 N N N B N R Y N N Y 10 0 N 0 0 0 0 13 N 0 P F default a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0 N 0 A 0 Y N
69901 8809655952113 3304 P A 13 1500.00 541 0 0 0.000 0 0 0 0.00 0 1766552536 1772692240 0 N N N B N R N N N Y 10 0 N 0 0 0 0 13 N 0 P F default a:5:{s:16:"min_items_in_box";i:0;s:16:"max_items_in_box";i:0;s:10:"box_length";i:0;s:9:"box_width";i:0;s:10:"box_height";i:0;} 0 N 0 A 0 Y N