Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8072f7d2824f8cf2e2fa165fe604cccf5b96ee653e3f5397e564b9675044b565' 
  AND token = '9PUMF91x5AzPVa7RWE2vk9LOg3s3iRcVEnC8vTXD4SI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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