Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e87f8121a11415016728dc1567d7d8abf94485c014a888d89f857ae1edf69dd' 
  AND token = 'bYe3VxEh8fcVKS0WEnmWm8j3ghVLvAauQoNjSLdJ5SA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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