Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6355c5a1e48709cbdbd9f4048cc73c872d94eefff34fa0f788e288327f7bd57' 
  AND token = 'U124RfYaJzyrVRAkdyE9JULDnlZ5bkc68VJHdNhsGn8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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