SELECT 
  var, 
  value 
FROM 
  cscart_ab__so_noindex_tech_pages 
WHERE 
  object_id = 24138 
  AND object_type = 'product' 
  AND company_id = 1

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_ab__so_noindex_tech_pages",
          "access_type": "ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "68",
          "used_key_parts": ["object_id", "company_id", "object_type"],
          "ref": ["const", "const", "const"],
          "rows": 2,
          "filtered": 100,
          "attached_condition": "cscart_ab__so_noindex_tech_pages.object_type = 'product'"
        }
      }
    ]
  }
}