Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0090ef8840f026fe6178712914965a0788e441e2e7a71306abfc8d20fcba6c9b' 
  AND token = 'zZKgmxq7IiqrJnRziD5G0LS2jCoDI53XTbiHD6hG4L8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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