Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '11fbece4cc5a0cb67d1df6cbf40ef4cb1dcbad1d375efc53cd97a465a88be2fe' 
  AND token = 'pgwOsmBnTXOfLLUGpjZEG7qQ0r/+cbB4+dHcr0D0vj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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