Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1511ab8098600d51dfaf295e681abc63a38d3b0d273c893419a92a360f75a433' 
  AND token = 'D4CfE2gEHQvVQ3nycs2m7ZHYhdpkKT5tbm9PAPnplqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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