Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f6832492b62eee1faf0cc9d6e356a1c7f5d3c068c0bb8c9c7ce07aca50132159' 
  AND token = 'fsw/+pXpnXJAAooPts0HcRQ3Xl82KnyW4jpV6frxiOQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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