Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '08dffd8294d95a5b93aa1ac69d28b581b6a4f4eede9ed72406bc2bc9edf05bac' 
  AND token = '8CsojmmMgcwJgq4q3+Uq/n8BG86/kgFfP3BeMMfPEVI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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