Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1c2390d04811d58e2953aa005a809b8b52317bc66cffe8856a960a25be07e507' 
  AND token = '30Uyl5q482dEa+tw1vgUek60Q97V+msALwx38KKdWZ0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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