Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '628086e4bb48a97d15d60e4c050729e369383add029c2841db703d3e9fb749be' 
  AND token = 'ZzXPhl5Qgnh12U35ByT9GZDVLnlu2lcl2tgCf3GcXrw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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