Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '69d3c2841c07c48748fc030ba8972d111f2d8b14dcbd2511236740fdc3aa5eb0' 
  AND token = 'qnIfMFfq1Y8GZ3qY2M2YAWNtW9LwoCcKyyDgous9g2Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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