Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7f491e1af3ed53e281df57ce1b63d1ed4254fea5c88b12b8003bfa3161c31a77' 
  AND token = 'koJC4uO42E29Dxppzzjtp+YpC0jByC8zUrzgOI7nYic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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