Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7dcab23e6984bab706b8c458a4cb3f57cc68dcb3781bbdea17cb303f6aeb9ed6' 
  AND token = '/J+aFvhn023xxmkQsLPi6wjuWAqMVn57nU2fkHfNxGY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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