Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c6d514bb8582ee11eaac398e3c0230ecb27e3a74161921b1f5dd4aa3dc6dcc1' 
  AND token = '+lyGd8jzYUSO640fxP3h2cvRbTlm5s1xJKOSXpaBFkA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00012

JSON explain

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