SELECT 
  b.*, 
  d.*, 
  c.* 
FROM 
  vi_bm_blocks as b 
  LEFT JOIN vi_bm_blocks_descriptions as d ON b.block_id = d.block_id 
  LEFT JOIN vi_bm_blocks_content as c ON b.block_id = c.block_id 
  AND d.lang_code = c.lang_code 
WHERE 
  b.block_id = 76 
  AND d.lang_code = 'en' 
  AND b.company_id = 1 
  AND (
    (
      c.object_id = 150 
      AND c.object_type like 'products'
    ) 
    OR (
      c.object_id = 0 
      AND c.object_type like ''
    )
  ) 
ORDER BY 
  snapping_id DESC 
LIMIT 
  1

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "nested_loop": [
      {
        "table": {
          "table_name": "b",
          "access_type": "const",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "4",
          "used_key_parts": ["block_id"],
          "ref": ["const"],
          "rows": 1,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "d",
          "access_type": "const",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "10",
          "used_key_parts": ["block_id", "lang_code"],
          "ref": ["const", "const"],
          "rows": 1,
          "filtered": 100
        }
      },
      {
        "table": {
          "table_name": "c",
          "access_type": "ref",
          "possible_keys": ["PRIMARY"],
          "key": "PRIMARY",
          "key_length": "4",
          "used_key_parts": ["block_id"],
          "ref": ["const"],
          "rows": 9,
          "filtered": 100,
          "attached_condition": "c.block_id <=> 76 and c.lang_code = 'en' and (c.object_id = 150 and c.object_type like 'products' or c.object_id = 0 and c.object_type like '')"
        }
      }
    ]
  }
}

Result

block_id type properties company_id storefront_id lang_code name snapping_id object_id object_type content
76 safe_smarty_block a:2:{s:8:"template";s:28:"blocks/safe_smarty_block.tpl";s:17:"abt__ut2_fly_menu";s:8:"contacts";} 1 1 en Contact us 0 0 a:1:{s:7:"content";s:731:"<ul> <li><bdi>г. {$settings.Company.company_city}, {$settings.Company.company_address}</bdi></li> <li><bdi><a href="tel:{$settings.Company.company_phone}">{$settings.Company.company_phone} (звонок бесплатный)</a></bdi></li> <li><bdi><a href="tel:{$settings.Company.company_phone_2}">{$settings.Company.company_phone_2}</a></bdi></li> <li><bdi>{__('weekday_abr_1')}-{__('weekday_abr_0')} 9.00 - 18.00</bdi></li> <li><bdi><a class="ty-exception__links-a greeny" href="mailto:{$settings.Company.company_users_department}">{$settings.Company.company_users_department}</a></bdi></li> <li><a href="{'pages.view&page_id=20'|fn_url}" class="ty-exception__links-a">{__('view_on_map')}</a></li> </ul>";}