Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ca3ea39e6adb62563f43665a7971a5ef3e3cde90109ff06a1e61c9d1ec36375' 
  AND token = 'kEe6QlUC2V/8YzFdCAOG970K0dPKWmyxuhhifNjrJP0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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