Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd1e4831a6b2019734236be66602a2e777de4e6ca3e9919750156b31ab077dae2' 
  AND token = 'F6BoCRjI+Wwxcpcge2iIPLQY4V67+JU6aR4YsySOWWw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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