Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '536e7835d1c66dfb7a50b4f11631386ae81481b6d3158855f0ff32d6a426aeb2' 
  AND token = '1naw4ZzDioHYpz+lez9iAczQRObbQGvCjdTuZOo0UUo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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