Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3924ccae0a1f9397e49afdb95efaa604a8c461240e6cc158aa1c7ca334f575e4' 
  AND token = 'NrY0ggZjJiHwDu3QFF2SUqzQ6aqZdR46XeeE+LFho8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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