Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8205f89e5c8d73d77a27ffc3ba7dba123c796b9abb9778dec07c28c0d88a7724' 
  AND token = 'g/9JsY2GiH0RTd4sOmn7YXXtrp5mfEXiM75RAJNza9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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