Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5d93d8c9c4297b73ad38976738cba0d9ee6f88ffde6a7efb97592adcf94ff196' 
  AND token = 'F9ICHREyCiXM8MGxUKcwzD0oNgi3G/Yfxc/thYPCBis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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