Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '531929ea2ec0fc62ad26eeb3fbefed5485765265f86bb3a217894ec9df72935d' 
  AND token = 'ONA1AEIXhUr8RUEIvDLMdDxwHNtQhb9OdJi/DsCih5c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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