Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '886aa3ce7eb6a7a55878fa2e69ee101662704a38b38207da0344c482c8c1ae99' 
  AND token = 'YvyVNkpwA9uFxueLcEfVksB9Mxf6GvVVJAfifvr0SkY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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