SELECT 
  product_id, 
  amount 
FROM 
  cscart_warehouses_sum_products_amount 
WHERE 
  1 
  AND product_id IN (
    84, 20, 109, 131, 118, 19, 61, 13, 95, 15, 
    85, 9, 111, 144, 59, 145
  )

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "17.96"
    },
    "table": {
      "table_name": "cscart_warehouses_sum_products_amount",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_id"
      ],
      "key_length": "3",
      "rows_examined_per_scan": 31,
      "rows_produced_per_join": 31,
      "filtered": "100.00",
      "index_condition": "(`test_uchur_k`.`cscart_warehouses_sum_products_amount`.`product_id` in (84,20,109,131,118,19,61,13,95,15,85,9,111,144,59,145))",
      "cost_info": {
        "read_cost": "14.86",
        "eval_cost": "3.10",
        "prefix_cost": "17.96",
        "data_read_per_join": "496"
      },
      "used_columns": [
        "product_id",
        "amount"
      ]
    }
  }
}

Result

product_id amount
9 36
9 36
13 20
13 20
15 31
15 31
19 3
19 3
20 2
20 2
59 14
59 14
61 12
61 12
84 18
84 18
85 70
85 70
95 13
95 13
109 3
109 3
111 1
111 1
118 20
118 20
131 2
131 2
144 4
144 4
145 4
145 4