SELECT 
  parent_product_id 
FROM 
  tmall_product_variation_group_products 
WHERE 
  product_id = 191 
  AND group_id = 0

Query time 0.00813

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}