Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '47aad1ef26cc3c48e146f6fa3396033a1b3ee38f6c45bc6c413b9cda77cf3fd1' 
  AND token = 'x7LPqcSZJ+wFc9z0nopYk/CvOy6v5DtyWDxADAklTjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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