Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '173e08ed2f54c25cb35eda7b7ee0154f08c23b33ae34617cc63666dabead0189' 
  AND token = '+a2IpVLgnvP5zwwLZC/3LsLiEUmsQT9Yy2kw01lMulc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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