Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '94fcfb68794c734354da67fa425ab035ec9c1c4dc90174db4d52f22001fb0ddf' 
  AND token = 'VL+MeFTePgSyZa0nOaRCw6uLUQByO4jJG8ssgfyUNQo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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