Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e39f58c23de8054e65e5604ed22c52e8764bc2530ad2b00e4635c3c8c93d6790' 
  AND token = 'S3PuH50+SOSOYdU+R8C5TtZ2GjVb0JZbjWyCsi5ooh8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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