Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7985a5278fb56affdfa8fb1b67227debcf840b82d68f59688c1a2e191c0eb05f' 
  AND token = 'cUEbc9qxAEHwV5F+lQezon85oTYplZZXhl+mrVBF9Fs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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