Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1de3565fe3027547b2747c078c084f6cc46d04339a413c6599973b7ed0043aaf' 
  AND token = 'TWcdFS+vU8ifV54bXQs2T1noOboZGzXqhU7td4OePfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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