Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64efa803209e775b6d24a2b3e920187cfc5187f08d06facb88ad06af77ff0c5b' 
  AND token = 'xhgtZ1HtPzGsqoQnECZfjHudH5MEfWPjq7a2I9yLjiA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}