Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8be5bd56cbf2ae108567ab7df4e7c3d995c6b05012f01aa3d42ee7f006820b92' 
  AND token = 'c3uJcQY3ohWU47maAeKW1ZWEjEGph7fux4oLqkrUab4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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