Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1cea15a4ca650f77e0268b37140ffdbbdd326d50965157138ea20d08c23518a3' 
  AND token = 'tJ0gPDYqYtJTTMNIb1psn6kzzUDCpRObZZUw9iTe4Lg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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