Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd3943bc0ab89916f851c281c9f738a1c4a7399ec7109416576116a8ee0a8d535' 
  AND token = 'Lp8JAseBJk1bnuUDLsVWCMwKoNs98xWf6pxYC60uEBs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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