Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '32b622e5eac6fe8993d258ddedb92375d9d90b8baf49536beb61b897b08e1e1a' 
  AND token = '5bnZ+334eaFZ4+28MXfMd1cIWzp3BDAdI9x4WzedpbM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}