Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bc0234530693b4ce72f7bcb32e64b6ec99328d67bfa9143f2205a0a8a426b16f' 
  AND token = 'NuQwfCB48pmNIhx9wtkt1iYGGMRPhttmtDaxFi9Tv6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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