Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '733def2e60021279cc67fb42c74db008a6a27f8413fb969ebc1128e2189e3db0' 
  AND token = 'lDmbWCjfAxfUwUJqEYC6B7UsdqjwSgJGSFf0vl9FgaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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