Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d8279ae950ca81c7e4c9922b5a374cfc1e4445bedfb85730da8ed1c49f65ee6' 
  AND token = '30xUdOJBczcGGdACzKJV1X4tGbYaKbKrBGAUgpV+h3A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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