SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (211, 210, 209, 212)

Query time 0.00027

Explain
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE cscart_products range PRIMARY PRIMARY 3 4 Using index condition

Result

product_id product_code product_type status company_id list_price 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 units_in_product show_price_per_x_units product_label_id product_label_id_by_admin
209 G0209Y9N72 P A 1 0.00 10 0.000 0 0 0 0.00 0 1328731200 1697804132 0 N N N N Y N N Y 10 0 N 6 N 0 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 0.000 1.000
210 D0210M5AN1 P A 1 0.00 10 0.000 0 0 0 0.00 0 1328731200 1697804132 0 N N N N Y N N Y 10 0 N 6 N 0 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 0.000 1.000
211 H021184FO0 P A 1 0.00 5 0.000 0 0 0 0.00 0 1328731200 1697804132 0 N N N N Y N N Y 10 0 N 6 N 0 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 0.000 1.000
212 P0212CTOEA P A 1 0.00 15 0.000 0 0 0 0.00 0 1328731200 1697804132 0 N N N N Y N N Y 10 0 N 6 N 0 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 0.000 1.000