Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fb30d4a3e64c918772beda288ae50f70cacf0f4b53eb839a379c10ebf590a814' 
  AND token = 'aSzdDp9QGZYw5Cc64581+Vd0cKMuIzAa9s1joSDrYls=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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