Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '79df4a67572e0a7c6e3ad297e91e6afd9b7f69d8e35fc972aa307a4b8e5dcb8b' 
  AND token = 'BKa0hudTFZUTQ3Rc35CqJvepfV8mt54crNMPP73+sHk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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