Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7a71fa5ed14ccd75941d3fa64eac75cb9d7128a31568b36ac3395a2d58fad303' 
  AND token = 'GQiyvQ1MuY1TZclTG9rJ6dHCBU9yUzvN7/7VClJbKdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}