Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6f3d18dcf990ab806dc84d10aa8b0c14dc464210f443d1dfadf8903dc8e9d534' 
  AND token = 'bumI8a8TME+hAVo4kA/U8o8UnhIuZ5951DKQsdhaA04=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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