Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fa18c67f40381864f6a67afcb916e1f70dcafbda8ade2c571e27a63e6283f36' 
  AND token = 'VXjz6NuBA3F/I56CkCz5wW/4kV2GDiKXS4H9/0SO3sA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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