Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14328e316c1aa276ac93b21f9ebf4f17f6608712d2a7b820990930c5758e9468' 
  AND token = 'nA44vIWcfoTednjCgqWfn648zjqIdOWzUWNY/1xGc/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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