Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8f635aedbb5296dd71905403d81abd18c64e767ee57746193df3801b78da19b6' 
  AND token = 'nGrYnNDQEzB4iem2sWzFSj049kf5n+uJWWJ1MNjInXM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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