Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7c7512df1ae98869dbb84e2ec83d3f457a9034fba532c65d9752c312e3e2eef' 
  AND token = 'KJmM/LeRHa8k8mvKX8xRqgX/wg7H6fkhtQxReH3zRf8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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