Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56940e4be34311089c30e0fd0af7287fe353371260ec3262e19de1b5327d4a4d' 
  AND token = 'tZKJTYA029lQt9hUr7P0oLPqiB4sb/QByIri0zhRXqY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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