Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '729d93e46a8d94323a7b4d4565a79d3abd1a58d12a1fe1dc448ef165b9567da7' 
  AND token = '36iWtzCuBLJsQTc2Vn0EUHkJMpKcps0HYg9+pLe8oHg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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