Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab58b4a1cbe9c0d8230b9f7e636a99a74fd438810146843476424b0ad5727866' 
  AND token = 'Zy//ent9WzhXsdLQUKLvQ0mzJPXswcQtP0iZYe7NP5o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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