Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1501543cbbffcd7c3f4318078de81d54692cc3cca4dd2a3a4b60cf96e7de70b7' 
  AND token = 'GrbRnWcVztyeAswrGPEsZg1SdfxoVtSSYM7MagiWgtk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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