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 (
    16346, 16348, 15749, 16347, 16338, 15753, 
    16340, 15747, 16351, 15750, 15746, 
    16337, 16336, 15745, 15734, 15741
  ) 
  AND cscart_seo_names.type = "p" 
  AND cscart_seo_names.dispatch = "" 
  AND cscart_seo_names.lang_code = 'en'

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.03197656,
    "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": 16,
          "cost": 0.03197656,
          "filtered": 100,
          "attached_condition": "cscart_seo_names.object_id in (16346,16348,15749,16347,16338,15753,16340,15747,16351,15750,15746,16337,16336,15745,15734,15741) and cscart_seo_names.`type` = 'p' and cscart_seo_names.dispatch = '' and cscart_seo_names.lang_code = 'en'"
        }
      }
    ]
  }
}