Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'addaf01f5bce7f5555fe424fd23d929589ff10a7cd323c8271f5db2f2f192e5f' 
  AND token = 'QQS/rCFwPZwiRC3pQdDWAFW1ZuGLH3OzoZRa4GztA2E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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