SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4bd32d90733a4b9bcf07b2389527045b4a5d831b43f07cea37cf6ec22c1f566' 
  AND token = 'Nhq/6iAyuLGBpWyu6HmvR8btE9gOedjSLIbQpJV8xUg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

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