SELECT 
  category_id, 
  yml2_market_category 
FROM 
  cscart_categories 
WHERE 
  category_id IN ('1152', '1154') 
  AND yml2_market_category != ''

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_categories",
      "access_type": "range",
      "possible_keys": ["PRIMARY", "p_category_id"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["category_id"],
      "rows": 2,
      "filtered": 100,
      "index_condition": "cscart_categories.category_id in ('1152','1154')",
      "attached_condition": "cscart_categories.yml2_market_category <> ''"
    }
  }
}