Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0798ff7de5c7aead8ce8bbf583e153398ba18d2fcf57ca19f481441d6d17e561' 
  AND token = '0dcrfXuIkYNYviN5KPFynSBV3bHXpikhDPm4JkG6/VI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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