SELECT 
  product_id 
FROM 
  cscart_product_popularity 
WHERE 
  product_id IN (
    42078, 42079, 42080, 41713, 42081, 42082, 
    42083, 42084, 42085, 42086, 42087, 
    42088, 42089, 42090, 42091, 42092, 
    42093, 42094, 42095
  )

Query time 0.00571

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "cscart_product_popularity",
          "access_type": "range",
          "possible_keys": ["PRIMARY", "total"],
          "key": "PRIMARY",
          "key_length": "3",
          "used_key_parts": ["product_id"],
          "rows": 19,
          "filtered": 100,
          "attached_condition": "cscart_product_popularity.product_id in (42078,42079,42080,41713,42081,42082,42083,42084,42085,42086,42087,42088,42089,42090,42091,42092,42093,42094,42095)",
          "using_index": true
        }
      }
    ]
  }
}