Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9efc587f292f88785f391503682919437c58fc322948e7fe8051fd230ac44ab5' 
  AND token = 'hN9hozPd7a3s/uWl6RfoULSHQSYj43KuIQI3LM3/Uos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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