Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9645ba5b9df0ea2fb67864aff2c401eab035b9acd0f08ec3cbbda86bcd87c867' 
  AND token = 'ekX/cngUkVq9G7MU/+qOrCY/r+QVn+/MtIYTFYX8WmM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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