Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b2dacbeb0318d1282876d3745d43b41818be47570ace8bf41fed32ea656e01b3' 
  AND token = 'CSoeN8zNjXvRcCs2evesSQoXwxVKImFVqswKVDNUiKM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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