Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be37d36d25992b2a414b367338e67e3394f59dac0443ef199e44bc9f58a7da68' 
  AND token = 'YHixEcdKiAJ6wtxCt7k0zXbM4uinzZnxxPSL+vy/YpE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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