Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8168e2fa162ec94025748b6dfc078a58214a24830d6627c2e40adb69fdbaa4c3' 
  AND token = 'pF+XNo0us9wq1JuW6blrbE0Kf5WcdwZ9BGt0fFRjn4M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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