Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e717e8e675645f87557abfc1a5eab525621a1d5a8ef6e3d1933354aa8befbe4' 
  AND token = 'C/Le4AjK83PUi7753wQOrnM7Wm+eK9FEoIVLwbvxeXs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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