Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f03b19291900f9ceb727bfd9655e1a15439375b3e33b3fdfd8ab4c279394af5d' 
  AND token = 'YsO+EwxKdxEG4F6wAas0s1VmbbwIOVWkouzIFI9YVBA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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