SELECT 
  * 
FROM 
  cscart_stoc_extern 
WHERE 
  product_code LIKE 'VCS-1020259'

Query time 0.00016

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "0.71"
    },
    "table": {
      "table_name": "cscart_stoc_extern",
      "access_type": "range",
      "possible_keys": [
        "PRIMARY"
      ],
      "key": "PRIMARY",
      "used_key_parts": [
        "product_code"
      ],
      "key_length": "767",
      "rows_examined_per_scan": 1,
      "rows_produced_per_join": 1,
      "filtered": "100.00",
      "index_condition": "(`maniamall_cscart`.`cscart_stoc_extern`.`product_code` like 'VCS-1020259')",
      "cost_info": {
        "read_cost": "0.61",
        "eval_cost": "0.10",
        "prefix_cost": "0.71",
        "data_read_per_join": "792"
      },
      "used_columns": [
        "product_code",
        "delivery",
        "stoc",
        "timestamp"
      ]
    }
  }
}