Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'abf007f9ed8e2536e1883c39dc98bf2adf840b19288066a19c75274ac78429aa' 
  AND token = 'k9qQhpRqcxooUIk9fHgc83OHQKeVeqfzfC8nHMjzlJM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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