Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9af4c82c2617aebab9cf1d65c66acbfc508fc71a8240ad8fd6f1f0339bfc3283' 
  AND token = 'HKD1m8inooDwp5WIHiO8WDxu7i3v7U5n+VvTuiTYzkk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00010

JSON explain

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