Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a60a27199c20e98e0900e7f9a8ec9c081d6e6a6ea4959dc02886af9c9f61f3f' 
  AND token = 'SYQKyyuP2EPIu5xMfCrtX3+qhhCSEJo6b/zuHSDnwTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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