SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'de5a7d6cde4f7f1cfb0295f23cb27a44b1a1ac25f8e971adc9ca3d5b85304ad5' 
  AND token = 'wbCF4yj2vPF/+KPW2lZD0T8hKBuoCG6+O0G3xckuWuY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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