Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4bf8fb6b6b4798767b6010121a999341d87db59cdc398d8988e047868ede40ed' 
  AND token = '1hKoyKBdx0+AaZd8KE3dJc1+9OqC/uawaEGXdH/0l8g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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