Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '242a4b22e03375ad8a478133c02fab626cf3032bb90229814a6ba4e6822a1b15' 
  AND token = 'tj5/H8KNdEK7U27DnepobI8R+OPVKQrw4N99ZEOpwsk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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