Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a06fe9be76e4ab787c90a196635957cdc8a1c99fa2760e54086bac910fcd8fc4' 
  AND token = '0TfgDRXr0FS6c7LPnwR2kAnrY/hOxFb9Rn4hIsmGtoI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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