Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aad1571878056ff1e0768b36e6838dfa18bbcdca7cdf40148764ccdb44342f56' 
  AND token = 'm1Gk5o7sl4hJscw57Jd+wgoK6yqK0PfFPU0+NSfQ7dk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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