Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9e33b5a7c04fb5df7b1a345fcb086d12d8f3fd22f0cbfc66c925dc3e2129dfee' 
  AND token = 'ymHYoQym8s8IEBjbY5+PtI7HDUT5lL3agWrEmGlSghU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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