Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '544027351c44a5bee39c449fddbedf12cf1c6b8898a0a4cac07e4bf644d90203' 
  AND token = 'HZyO738mqqARAHpMtDx58gOK8ZkJ+QzqJtnOezqztvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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