Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = '106e27a5717289222bf8b728512e565f3ffaca7a5e32124433ecdcef4b12e6a9' 
  AND token = 'kwa29kiySgV/MMvumU94HoWIODsi8Zsu7COuq4Dnu+k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00750

JSON explain

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