Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3bb95d3827af877397044eb559b35c85fbd88128bdcb9accbbb0acacd40122c0' 
  AND token = 'YD7gDkuZ0iYOPOJa0TNIwpWXzAqhldArTsx2/2Mrn54=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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