Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4391c6b424db672d7ea7a0ab59f550d58373b136640fa9dfb048744d8e8b3e7f' 
  AND token = 'Y+4138JvmVjsWcH3aQLt7k8nlBD5cveCEeet8800S5Q=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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