Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '887c8e2da55c3cd8b1825162266f5330bda7c78f83620a9b7b15a8b99b9d58f0' 
  AND token = 'x0HUBc86EoPRAMkgcx2hxJW35vE907chTjDpfHsXnK4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00049

JSON explain

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