Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'af83844cdf630e9728171ca5dd8962861f5fbd300e13127ebe8dcd2689f5de81' 
  AND token = '/h/Zk23k9Wc0KM2lV5qpO1lMwzReI2s6EkusHDAJIiE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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