Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8c1358320771b693afcd5df7d879b6df5bfc44364385c105125a43f85c09fc28' 
  AND token = 'qb8UuPds619oUKcc7Dvp8mhcPuLvu1GwxEx4Sey/XqU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00059

JSON explain

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