Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '06e676a4a656b70082301a71a411720272e06aa0b7cd5a205c6b973962966168' 
  AND token = 'mgj5ThvhEXCi05YIXb3/8doR0Fj1GhmWGzqYzmBJ52g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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