Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dcd1f036d4109a30962879d8cbe15e0ea179466c39332c8a3050ee07781a2ae8' 
  AND token = 'PxZB8ukzb0GCCnHuBa+JjsUbVBaAIiKumuKAHrOTEn4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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