Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '530ec70f49b78400e480830392d15bdf9fa8036b10c2ca2cb552fdd5a9ac73e1' 
  AND token = 'wLelnGzRDSR7SFWSPO5eoUMTQf8oQuMauLQtieBkk50=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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