Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6bef171ad55f93fbb901be040d1a4d83765a391786cd8c733a5fbb2ad184cb7d' 
  AND token = 'vTcf4bItrFVdMyb4A4MKAc+sYdGcPV/58ebFFHJjgDM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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