SELECT 
  name 
FROM 
  tconnect_seo_names 
WHERE 
  object_id = 0 
  AND type = 's' 
  AND dispatch = 'promotions.view'

Query time 0.00067

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost": 0.002024411,
    "nested_loop": [
      {
        "table": {
          "table_name": "tconnect_seo_names",
          "access_type": "ref",
          "possible_keys": ["PRIMARY", "dispatch"],
          "key": "PRIMARY",
          "key_length": "200",
          "used_key_parts": ["object_id", "type", "dispatch"],
          "ref": ["const", "const", "const"],
          "loops": 1,
          "rows": 1,
          "cost": 0.002024411,
          "filtered": 100,
          "index_condition": "tconnect_seo_names.`type` = 's' and tconnect_seo_names.dispatch = 'promotions.view'"
        }
      }
    ]
  }
}