Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1b36fcab02c9b863e7bced527faacea3f7c591f9ab16dbab7438da846258fcc' 
  AND token = 'M831s9Vy9wHNuHGkU6fOgEWjeb5n0a5cYErYOSyzgg4=' 
  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"
    }
  }
}