Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7919f8317ec745e588763b3b7a051983b534e44fcea87ed21c013be68bf0f2b7' 
  AND token = 'aPYHxvxKIcWqI77iIqkHPZO4jZBKDMelOGRkqJiTkis=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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