Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ccdbcd4435ee048dc11b9cc8770dd73462f991e59e4f3436ffbe42cfec9cad89' 
  AND token = 'qh0ovlshmIhcWfmL2WErtoyXKuyzVK7dK+he9CL7oLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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