SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5e5817cf03922c6140687b9aa3617a5a0bd4f95283f5bc22bbd534a7ff0377a' 
  AND token = 'bdDCtUC2BGFju4DVkSHZtkCKQZ86yD6I5h+ljALw/DE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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