Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47d7267e908e1190e95f7a48d2e5d3468c0df9209920734afadf446ae3969b4c' 
  AND token = 'q4xx/yvtJiQnInxrtAvjLFv8ESTzwCXr8Y/4tBodKfg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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