Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '64c1aaebe96eb2b930bee9aaa51c7d518f6a03c2a051c03bf7f140ec1e588c28' 
  AND token = 'UNYeHYdl8ZHaOOuV0ZTjDG+DsW6v7fJZ0fadoLiif4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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