Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5f38a32d6755d8c97ebe68b3a197b309933129459098c312afc37b0dafb03c8d' 
  AND token = 'o83x3Pjpe6SkdUfm/MGw3tYQDHjsunM3Qr85tjsZ0qQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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