Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '29809aaf03508caa7b4dae3e4eccbfcc1a9dbaf1bcbd5527c6a1261062c40177' 
  AND token = 'IFrsVNC7s9km52VueuuTFfL7bIs7iJGIoNACFNkMu6Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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