Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2847c26d96efa72621b0ee2940582755b30cfb81bacf1e3590b0a9cd88b370f1' 
  AND token = 'Erlj6ZK2hz7veU9cMbeDGx/GwSYD51k/aV10+9Acmuo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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