Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '26036f9354b31074228f63a4c687cbddd44e1ec780caec2316e5912f0d8501f1' 
  AND token = '1S1RcmkJbPm2p0u5KtZ4QXp6fiVXAMCme2STJNJTzpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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