Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e4994bdb4a585a196d52df1f0eb47257bc34b3b6266dc67983fc4fa3b584ea9b' 
  AND token = 'jI9tMeoI0gVyJE0AxU1+gehaXI7N16orLwH+YOTl7nQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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