SELECT 
  block_id 
FROM 
  bm_blocks_descriptions 
WHERE 
  lang_code = 'en' 
  AND name = 'Shop Categories'

Query time 0.00075

JSON explain

{
  "query_block": {
    "select_id": 1,
    "cost_info": {
      "query_cost": "64.20"
    },
    "table": {
      "table_name": "bm_blocks_descriptions",
      "access_type": "ALL",
      "rows_examined_per_scan": 632,
      "rows_produced_per_join": 6,
      "filtered": "1.00",
      "cost_info": {
        "read_cost": "63.57",
        "eval_cost": "0.63",
        "prefix_cost": "64.20",
        "data_read_per_join": "1K"
      },
      "used_columns": [
        "block_id",
        "lang_code",
        "name"
      ],
      "attached_condition": "((`goimagine`.`bm_blocks_descriptions`.`lang_code` = 'en') and (`goimagine`.`bm_blocks_descriptions`.`name` = 'Shop Categories'))"
    }
  }
}