Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '05cab8c7b4360b70ffdfe19a5685897ec20d9bf4df1be3cd1a820c315348cbc6' 
  AND token = 'LaasdfzBCmi1NFYpdk+MgdXc2XXx3TJGl+3riyD18mk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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