Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eb316aaae16b46d3044149210a5bb22f7a8708c2fe2446092d03a196cbc2418e' 
  AND token = 'pxgDdj9ZNaBFBLAwy4qQm1BugXLnaBVhSF12tvHk9n0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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