Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'caaf999affc5cee27ebe2cd27b870337a31372ccd4f3dfe3b55df53a8432995c' 
  AND token = 'vEOnpGqvXSExzXe3GvzBKvpeMSGXy4eesEo2GpxXRrA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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