Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ddb8d1576c1383b26a43559b4f236de2d3faee10d2592a5a3283e29bc19925ad' 
  AND token = 'EAYnRGp84suL4EPec5OU5ZCyj3dcQxIhpj9ZcCedNxg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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