Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '09e1377f6641f16e1b737caf59ce65badcd5b9ddb4fbefb5853c4dfd8be0f9ad' 
  AND token = '9Rr+ArZ9HA/xrXRF7zyLjyYTRbyghE49ZJZuFVsqi28=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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