Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '357c9da097444a5c290bb52ab4066cf2e5dabc402882b71b9bec962f0ef607ea' 
  AND token = 'aS8i+0L622qqCFdlFdIZTBxkGrd5UQMu1pP89+5NQjs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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