Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8d37d1a6ea2878476acad49a1d961d928dda49556d549061b9fb9b7df65dc792' 
  AND token = 'ErxPYe5y+P4nMZniKYmdlCnn8Ur8FrqxRwOBKcPz4ZU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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