Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '566134da384d8c7120e161e73d6ce65c478a091cacd13e6b819667b21403607d' 
  AND token = '41LbbDe/41FB9s2RwpEQ69ySi70vRogW8WHPa2mCeaY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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