Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '14b09d84bc9c01f29a725992d146d00ec1abd3b6a935ea20493fe552db7c02e1' 
  AND token = 'zqN5uf3z5CF3vKFt92jOfxmLGfdhC6D3o7g6Zxj0QL8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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