Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0a08f030b61ceb1e59e14fb66ab79e6fb6b0d325fd6afced8047060a5aea875' 
  AND token = 'xQHH0ZFORxJJUTHe7Kp9mib6MUbwB/zR/HovcdN6sos=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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