SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c45ee2fd5abe4b54b388cd14abfcb2fef094207c4fa43dc83f465617c338fb2e' 
  AND token = 'FLRIUl1BmKYgrg2KnKGsKOVvk3AbQhHvWhl/pDw5k8Y=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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