Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92c6ca871b26c91cf0f064826da529e45296dc709729afe516b23721431f4373' 
  AND token = '23gVvR4jYDLj9RT8NfN/p/cAyLycO3rGPQRdkHVVjbY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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