Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '65cb8e3a40d24e2ec97dc6bcff6b303a2d19c35419670c25da7be621e5df20c1' 
  AND token = 'mgsF+louePpOJ9H/Qy9E0LLTlMNJ1EpZ75GpSttaFC4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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