Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5da52dd5f6982c802b3abf940d4e646a37f9c6608a48419e9901d0910a681095' 
  AND token = 'Y8KBkK5i3o/y82Hce1BI3G4EPbYjMyhOuso4hOIVA74=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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