Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddd078df502d19f997a91991225ddc496b98af1f9e8063ed17bce33527b19821' 
  AND token = '+3qexireb4jpAhQOu15tm6CMTcUT6Wctg+BqbXqXd7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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