Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee9f812fdce7984d45a537eb41b9b8b030df3ea867872b9aa973020bd5cf68f2' 
  AND token = 'kig2ZXH9mJ5r7LkpIT9tN62uTREG/m0cx2RCYI6pcQU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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