Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4ae4be6a8bca89d43b17b9862ae883b38d3b90a0dea2e28749872a40a3eb3388' 
  AND token = 'sDIjrqcV/iAuIT9ZybTWstudkY3liduW6bUJ5VpUnrc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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