Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2145865ebd0736cfb56b0340bca1eead4475f040624749a391d4472e0c698de1' 
  AND token = '6Cef2KtUo1F7mIwndAHTZnX3XL0GE0d/9oeLqNAXaNw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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