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SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'fa9e7a6ac176829ce94c2b70dcc474f98601c2f41a566fe807c2441f2a651700' 
  AND token = 'ITvwbGU17eaw/RySs9Dst4BHBQtTYm9I/ktMpa4HC48=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01497

JSON explain

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