Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce39d40669020533a4e54c5041c874b6d49f8e50b960834c5726ba26762b58cc' 
  AND token = '6AGuSDWv7Dx+mwmqr8cWziD5tGxF5nT+Wew0L/rgqiY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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