Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f8272d848e9b221fcbb4e8799e7369b0fa04d3aa6e6737b305e371f6a1c352b6' 
  AND token = 'Xt+0A+OLFlLs5b1FCdlPrtkQ4cqoeQFsGl3eGj+T6lY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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