Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd9ab9f4ce8e91ba4ebb85008f34d4eb61180146c8e4e40526b06df2668edb99f' 
  AND token = 'hcM4uctlc633ZGUuknVgA7jd63jXJhXY3zpSUy1DTWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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