Sandbox

SELECT 
  1 
FROM 
  vi_lock_keys 
WHERE 
  key_id = '796cf4f1edc5ca4a8c53eec3ea7e896a0128a9ff9a4a32334a772d65eb347609' 
  AND token = 'g3siaBt1SyOv/rvau8wsQLwdd2QLTho0A5KMvhwVx/0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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