Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b38e2efda2882b83e3d5725ad1c61d2e9ed226751b5cc00ce163c54bccf83648' 
  AND token = 'XtYF9vs4jXsknxT8pkzQJ0SrezrpBumGONzTD5RdK58=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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