Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '586c45080cf1a668ff61329558e5e7d120f07eb9406f8ff3e6b91a8050439a76' 
  AND token = '8zdf0B8K1mM1KVVr8oDFFkYwsRJA8NnGa0E8S+sZoOc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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