Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3eac8683e42f460a3a930b7ea754dc53f44ca392aee599958c7c38f6cc0fcc46' 
  AND token = '5Vh3Wl9sOksQHKw1hFJuhLJKouClA+MU3HV6PL2mahA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}