Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4f3a9c05d62b97f34b35827c12f8809ce3a3b72da91c784cb16e35ba8e19aa29' 
  AND token = '12kyGfljOqkz0+8NVn0GtH6+BP70F1BVsr6BnlYo1vU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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