Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8aa3817d754337c4fed74606c6000fe961c88804768eef3a87eef053a45d3a8a' 
  AND token = 'h4jSigw1KVDtNCUboNVfIgQYHMXy1LrAh+SKJlI3PBc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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