Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6aefa18bb72a85fa5e5c41cdd2ec5063a6bec25092a8842ed9d376c5e671dcc0' 
  AND token = '+im/2YGUM7sINGyjYmDpPcN2KQbs2/fKsu2bwLMY9NI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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