Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '38039d6e303c7a2f3af201b7a6e65dd1cbffc43e0a89bcc74cca71cbc3c60a60' 
  AND token = 'ft8gSXZdrjbl5BCPo9+2tR3lJyVyByoUJPUjzmBvXOY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

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