Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f73cdb25930bd293c908bef807605532a48ecf72dd3dd8261d369cb0a8bbef7b' 
  AND token = 'Zqt9Tq0LyRmrDvOh5exDC+k9si+VscB4MBjjdgqTWBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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