Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bfa1264b900ee37eca7da81dcfa4a3ab8dab828d5a7b216c53e164fb7f694cb' 
  AND token = 'PFxwlbov0Rsk7iOn+lFItOcsiZ9EdjWHUPxyBq/BSiU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}