Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea2f4f81bc7b86a21c004eeb28a55d2b77d97a48942522708ebe07d30ceed325' 
  AND token = 'D2yLP3zVI93Nj5m6VKK998JQ55SJftMkVAw6lBXVkC8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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