Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '516257b96b5af09b502a4b5b554b1ff90caa339863645a9f8f3ac774cd83e5f9' 
  AND token = 'EIk94vkfMZPmvJOSV6pdk5KSHXecUaQTJ+er7T+YzMk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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