Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '42af7b7842607a79ea246f155cdc41a74fefd96cf040fcf717ee1bc426d1cea0' 
  AND token = 'v1NMte6mY6YVuHsOWYC5Krs/e2EEi2ZYIdmfdpvkkGU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00771

JSON explain

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