SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '67b2e2383f6b64628c058974a54e64fc201496c3cd1f552759bf9b161ea25117' 
  AND token = 'JKXJfGnGW8cs57uliqqD1nP84B+IppWXxjhaLo/oGd0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}