Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '9760d88d48ac5d7dacff577ba392ebb1893043f7224a03b1b70920b5361a17db' 
  AND token = 'UoG3rm5eNcdIm3Ki8RHkH18eZRNg7I69PfibVIoq304=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00009

JSON explain

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