Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bdc7c0cfd70e563bdf0aeb86840a80ee58efc485a877c18e454b547a025d5aa9' 
  AND token = 'Hr4IcRBorhtBVkTQgHizCM3YO3b/OPGBqK4LywQMiEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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