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 (
    39124, 66758, 65547, 39922, 69901, 67036, 
    65175, 65171
  ) 
  AND cscart_seo_names.type = "p" 
  AND cscart_seo_names.dispatch = "" 
  AND cscart_seo_names.lang_code = 'en'

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "6.51"
    },
    "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": 10,
      "rows_produced_per_join": 10,
      "filtered": "100.00",
      "index_condition": "((`cscart_db`.`cscart_seo_names`.`object_id` in (39124,66758,65547,39922,69901,67036,65175,65171)) and (`cscart_db`.`cscart_seo_names`.`type` = 'p') and (`cscart_db`.`cscart_seo_names`.`dispatch` = '') and (`cscart_db`.`cscart_seo_names`.`lang_code` = 'en'))",
      "cost_info": {
        "read_cost": "5.51",
        "eval_cost": "1.00",
        "prefix_cost": "6.51",
        "data_read_per_join": "16K"
      },
      "used_columns": [
        "name",
        "object_id",
        "type",
        "dispatch",
        "path",
        "lang_code"
      ]
    }
  }
}