Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9fee2e1cc90583d6495f478dedd79cdd751cb17cda8661621d2c23148e256efc' 
  AND token = 'RcD4uoO/uZIPK2zSc9OFF3gInWBKr7yHTOJKItSAPBk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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