Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee4023be1a8872fab704621c05e076d26e9456ad595b883cbabd35da95dc36ec' 
  AND token = '9E4ObI299qGwPJE641Towf9IQCcTw3iLS9mtUCBr2BQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00143

JSON explain

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