Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e680b42acc51b05cd7b4c7072d53c4d17e713035a817a0beb5503e0ac7d36e8e' 
  AND token = '52AQ4cYwV7Ok2IqQOUqzvd9PCRXiZKmaow0LI7K4TkQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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