Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b717506dc8a7211da8315113930b97848f77676477929a4989563fe63417117c' 
  AND token = 'ecMp6MqHERA5EaY4oszWnpnPJlckib9xSvCjXfTPECs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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