Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '6ecac4099b69500f9b3cea150f70aba68585d712c157bda5ac9c2da627b05832' 
  AND token = 'gnQ5HPoI/nhEUJSJPsd9Zd8hf78f6lwe598VCAzzMhs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.01601

JSON explain

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