Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9640c92580959c825a233a8e3751f681c3592cb6fe063b0b8ef552bbbb3bd2be' 
  AND token = '4UzTR7prSGewscsIzzuNXjWgOrqYxHvtLl99bYFwny4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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