Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f226fc69cbed5be6dc03cdd564316f987b4a2526963733daf6b7f17acb8c2829' 
  AND token = '6a9V5ymbYCRrdl1X9a2qwg0jHUCvLOkBQKA5hH9mOTA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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