SELECT 
  cscart_seo_names.object_id AS product_id, 
  cscart_seo_names.name AS seo_name, 
  cscart_seo_names.path AS seo_path 
FROM 
  cscart_seo_names 
WHERE 
  cscart_seo_names.object_id IN (
    349, 346, 345, 331, 335, 339, 341, 315, 
    289, 287, 286, 278, 280, 282, 247, 248
  ) 
  AND cscart_seo_names.type = "p" 
  AND cscart_seo_names.dispatch = "" 
  AND cscart_seo_names.lang_code = 'en'

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "49.61"
    },
    "table": {
      "table_name": "cscart_seo_names",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY",
        "dispatch"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "object_id",
        "type",
        "dispatch",
        "lang_code"
      ],
      "key_length": "206",
      "rows_examined_per_scan": 24,
      "rows_produced_per_join": 24,
      "filtered": "100.00",
      "index_condition": "((`pankajecarter_systemfour`.`cscart_seo_names`.`object_id` in (349,346,345,331,335,339,341,315,289,287,286,278,280,282,247,248)) and (`pankajecarter_systemfour`.`cscart_seo_names`.`type` = 'p') and (`pankajecarter_systemfour`.`cscart_seo_names`.`dispatch` = '') and (`pankajecarter_systemfour`.`cscart_seo_names`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "44.81",
        "eval_cost": "4.80",
        "prefix_cost": "49.61",
        "data_read_per_join": "40K"
      },
      "used_columns": [
        "name",
        "object_id",
        "type",
        "dispatch",
        "path",
        "lang_code"
      ]
    }
  }
}