Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8e7ce13dd540466d794ade93c19b272d16dfeeb3c0aa4ea1f92bb68b29e01d14' 
  AND token = 'U7ei3ao6lYvfJTsR2/uQHozrc1EPkzTGWoBC+VI7s2w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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