Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cdab4bf6c8e7d3cfc4b2843b0fc0bdf11bd95302b4aad8a7d454deb1ef0cc0d4' 
  AND token = 'p5PsLCN69UtTTbPmuAVN1Jtc3EQcxWzyCLFSe9KhQ9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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