SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '84077570effe542ab21b65a3ed1c6991fa9458a472f7d6930dfba1e1bd126800' 
  AND token = '/WaH0A0LrNwuiSIT7qrKEOqkWv2XlEuzMCVCGa5ZKwY=' 
  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"
    }
  }
}