Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '75d2c00b16df44df9ab69d734cfbdedb24fce8513c2006a8f88dc8fc6bfb2a60' 
  AND token = 'RDAeDmbwTVsn0YY/e3fY5QQe1g73G7KkSwwwR38MDK0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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