Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e91f59fc40df572463226db283d1c654bf7414aa26385918fe0513b0bf878ae4' 
  AND token = 'U5Gkt3kgNda5uiQLUxW6s/R+BYy2xEs3rbgtxOKw4hk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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