Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '067e704ea297822fb93d242f305b09409034f4cdcc3957a6110364f0c9b4b992' 
  AND token = 'kGUAUeWp9GYsTr8R2BgGq3T9VXwIl2yH1Rxzg0KQHWQ=' 
  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"
    }
  }
}