SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5c7f444b898d686d4fc51d3a225a95ef7665f74ececd0afc3c7298f1a9321cd1' 
  AND token = 'TBONbZI/FeSWgchEtAvZKtRQIpPfwe/Gx8fHGEJE5KY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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