Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f5037595fb0cb671fc8bdc15c81358e07b118b2b8f03f7f802e3dc2408009e97' 
  AND token = 'TYOKHBzLxNtHmULTiL9haimuJCuZetAYj33/OPnKYso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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