Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8837e03cc273e035a95e87a7eccc2a63347e6d97a9fc8a8f18ad5be9757fd3ad' 
  AND token = 'DUJ44kk38PMg1etH9oFh7ZvVydowMZDca7cu3BLQNFY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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