Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '522505ce5870ff01f61d6562127da57f8fd614ca7a1af5185719f91c78a11615' 
  AND token = '20TmhvVCIhOv1ZFVr7RmeRtaoJjdy1BjMsDSsdYkKzU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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