Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '46f340db4cf4e93e08c8c593eadde6cbd819dc5a8cace9880fb529c6fd9bf46e' 
  AND token = 'DuYGDJN57MhTz53evO2FJT9o9X83rCUPHcS8czG+UNM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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