Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aadb92e84b042aa8f8c3eb963aa93eaa332925f4409d3e26c5b21565bf1ed6fc' 
  AND token = 'suvJ89x5P9Ms/YQy1dV/zPVaQYaRAgqkm3jYTvrxtBE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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