Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '2fbba5ec81e80d6989418547f4e527244ee3198022d56422b7adc6063444000b' 
  AND token = '6nS9+pIy6JxhlIXs2qIvfcE0ewcdCxYLfLQbuzg54j0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01471

JSON explain

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