Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '5046d654c514ab1e411a793439beeb900d7eddfdf611b5ee0d2de66a11e33a53' 
  AND token = 'EsvvhplH/HAsAG9fVyl5E97+p5bz/f8OjWCDSbOrfrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00897

JSON explain

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