Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2f0adc36104f2a7d07ad01d6f0e09de38a8b08ba43894777933323b0d3421c9f' 
  AND token = 'xauDcpeY1YKOVODy2BfqtYJm9Rz0rJdfpgK+RYFKFVo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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