Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '24c8b5dae5648081148ac674d2cc5a9942480c51be923d50fba261aa49a5ca11' 
  AND token = 'bmvd70m2WeSBdOgIRuNOwDs/FnTpkc1SiFnrduQRwIA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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