Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd8f5f3f297f537b813ca5a6752fb927a5328a74dff8c1ba849a73933ad78f66' 
  AND token = '4SwNi/H956SxM34F82347BpyToXE3Lu2VSMSfQRTovM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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