Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f70c3a87f057ba8a36b63c862f87381ab5f671c3fdc905ebe664ad377a2be971' 
  AND token = 'Ju9sAY3n0LHBdf4QJ2bCwUZf1W80SsVPUVXPsngync8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00048

JSON explain

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