Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aef746874c879830dfae9beea54340a9e316af7c44eaf41c45e318ff07f79b44' 
  AND token = 'dhsv+UKm3N0rR75moeCPvfeA3RJ5sQHzxCM5/qPLgbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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