Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba6a958a87c045ab660fe4ef61753255ccf7fa5c1671e330a1c9a09899724414' 
  AND token = '2rm29HFGxdykr0stya9jLdfwduSJJ8QLw5Gc5UTll0c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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