Sandbox

SELECT 
  1 
FROM 
  tmall_lock_keys 
WHERE 
  key_id = 'bf27a594ffe2868f073525fb70b6363898c9b4b10b3d95e42b453a7bb6a9cb82' 
  AND token = 'NK/Ag+lt5ez4To98Mz/g2dul/hoMUjARsrEeXxPVIdw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00767

JSON explain

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