Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dd9d8ff82d4bd86422948449b214b66e7a20b0495b14f981fc30d47641d5f3f' 
  AND token = 'yd7M4iQEYF9jRa+cR0G9dLuSmPPQAoQwSXMi7sGduKA=' 
  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"
    }
  }
}