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 (
    312456, 312881, 312443, 312873, 312841, 
    312842, 312847, 312848, 312840, 312846, 
    312838, 312839
  ) 
  AND cscart_seo_names.type = "p" 
  AND cscart_seo_names.dispatch = "" 
  AND cscart_seo_names.lang_code = 'en'

Query time 0.00032

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.0237706,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_seo_names",
          "access_type": "range",
          "possible_keys": ["PRIMARY", "dispatch"],
          "key": "PRIMARY",
          "key_length": "206",
          "used_key_parts": ["object_id", "type", "dispatch", "lang_code"],
          "loops": 1,
          "rows": 12,
          "cost": 0.0237706,
          "filtered": 100,
          "attached_condition": "cscart_seo_names.object_id in (312456,312881,312443,312873,312841,312842,312847,312848,312840,312846,312838,312839) and cscart_seo_names.`type` = 'p' and cscart_seo_names.dispatch = '' and cscart_seo_names.lang_code = 'en'"
        }
      }
    ]
  }
}