Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66dc8d9fa1c1e976a1e726cde35870b68581c253ab2acda06a8d00ea2a664f45' 
  AND token = 'y7+0VuE6jfokY6JI8yhyISd9D6VjLD3JK2XKmtI7ruY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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