Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '86f99a134e9a745298f9f61ea4b19f15bf8cd251d916e9c3dfcf6e4a295bf8d5' 
  AND token = '/cM0LJV857Wmj5oyqYVqIYzVpnA4VRbSvXAs/r4lDHM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00797

JSON explain

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