Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cba1f2f55d040ea33236371d53c0cb4271b5a34d1326b1719857344475828d55' 
  AND token = 'tNc3lM2NO521kWAachYHctAkd4+R9OYFrLBTgrFAm88=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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