Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '507957ec4de86f3697113872ffd3796e02bc9ae91d90516cd6e35d394aa212a8' 
  AND token = 'ZlVDOmw3bosPbP3kEhElNAbfmeiqjFtuH3mpnKFY2iM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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