Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c95b6eebb2bae0de9ba9334b0df63d5514c04799d1ea4ff4715964e54e5add5c' 
  AND token = 'USK8Z8MHfXz2ERNEaz3xewDUV8KKQQKYtZ1td525VOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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