Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3c80aa71a44fcb910fc7f21251c0ae1755286362269027e834e089e9c72e84ab' 
  AND token = 'wk34tt2455KqFmjwW3K8jQdpRv1b4eXqhQsFFUo+csk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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