Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a9adcaefcd37170a57295f2e1b3dcbc7bd1ecd69998bb2cc4ddd36c6cac01a0f' 
  AND token = 'VX1s7f+WyANTgCZ+2bYUqmCiyNhW3P41ql3PIKtGIaA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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