Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3da156f9907689cd0fe3fc9f9d6a18e6b45a5255833adbbd3d6ed9a57e6fe6de' 
  AND token = 'QZ2zyy/rSWvTsCvUzvE6XTT7ief8EWCut550/5IquUQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

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