SELECT 
  cscart_products.* 
FROM 
  cscart_products 
WHERE 
  cscart_products.product_id IN (
    12648, 12611, 12596, 12607, 12608, 12610, 
    12643, 12649, 12609, 12644, 12650, 
    12652, 12653, 12654, 12646, 12655, 
    12656, 12645, 12651, 12597, 12615, 
    12603, 12629, 12604, 9776, 9777, 9781, 
    9775, 9778, 9779, 9780, 9782, 9790, 
    9787, 9791, 9792, 9795, 9784, 9785, 
    9783, 9786, 9788, 13031, 13032, 13033, 
    13034, 13035, 13036, 13037, 13038, 
    13039, 13040, 13041, 13042, 13043, 
    13044, 10840, 10841, 10842, 10843, 
    10844, 10845, 10846, 10847, 13152
  )

Query time 0.00122

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "cscart_products",
      "access_type": "range",
      "possible_keys": ["PRIMARY"],
      "key": "PRIMARY",
      "key_length": "3",
      "used_key_parts": ["product_id"],
      "rows": 65,
      "filtered": 100,
      "index_condition": "cscart_products.product_id in (12648,12611,12596,12607,12608,12610,12643,12649,12609,12644,12650,12652,12653,12654,12646,12655,12656,12645,12651,12597,12615,12603,12629,12604,9776,9777,9781,9775,9778,9779,9780,9782,9790,9787,9791,9792,9795,9784,9785,9783,9786,9788,13031,13032,13033,13034,13035,13036,13037,13038,13039,13040,13041,13042,13043,13044,10840,10841,10842,10843,10844,10845,10846,10847,13152)"
    }
  }
}