SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '0bd5dbadcb4c546cb658b73e7bb9c25accd8f035fa4c982028056a5846f20ad9' 
  AND token = 'xWhoj8lVd1gSiVEseD7ubyBrmQNcjFFs3zg2nVPwCIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00011

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}