SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = 'df1f0e688970a747dbc39c66fbbc3329ce8579951f3b93151447d61edb132375' 
  AND token = 'TQjc7LkeRkH5X9NvhDl/ScglBYCiR+/6l1zUyEgOycQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00008

JSON explain

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