Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cda030d5e3d0db9bd41543a478185f522ef3d3a6ca11d4da7e7cb3d42b52fc7d' 
  AND token = 'CYzNBSmvuZuF5iOE5L8AM10citd/Gp0OWAyheowuYz4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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