Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bcdf5f4f8184f58d1f7d4c0ad6cb7df07420e9e17a5353c1feb6b9bef2f3b111' 
  AND token = 'DrY5cZW7k49UNzed3wZbgPPTcM59LLGpdkRHsrroZ9E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}