Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '66d8146e118371c50b74fcf52dc4da82d6b1f8992fb55a66568e10ab7b3957d8' 
  AND token = 'RFKFR5CmUojkfWiDnozTWBCqKnQXSaLrsS5QcGHetp0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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