Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c799b1e7603386d6688b3a88248caaade6c33f2d152a19c18ebf8801de295a11' 
  AND token = 'D9h5B6wcoHfT3K9YH/9N8PSfSSXhK3vxEO1kSn02IfI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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