Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c027c46282c9de7037551934b67475674b934237e783f0d8bcf96bb1ba9ce8de' 
  AND token = 'Xq1KbInWwpm2cbgk7Eoxtlhr4Hwlp586k4x1oL+IEfY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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