Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74b1a8451b05717a27acd42c93fd1fa3d71262ec5ae78f1f013ac2567a9153f7' 
  AND token = 'nq4eGbTm6AaBWtLijfakXhFS9LjAi9J+KAI5uEnujBM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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