Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cae064b295b3297c75d930377ea8bc62a770ba29f84d78b6f58a44bb0e290b5b' 
  AND token = 'lFHw/LEXtlcAn0nrZhW0vZgHbJqew/iNk1TBP5iEXQY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00051

JSON explain

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