Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'db6385c93539a2fe27b7d32ec2f7c4e5e3a7a4d47da8c7b19255bd5ec0237245' 
  AND token = 'wDHxBvayFFGSp5XZY5f3Y/8YlWPf8q3EAOUU8E6x2+U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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