Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3a78504e2aa6c9d667b8e1a0ca0ea5ac13ac455706a124c2efea935fc533b7ee' 
  AND token = 'FZ4P5LE8IOOYcyXNKu3NLqc84f2lQXfodrQOllpdf1Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}