Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '412df63f8fc5602d8b9a417e7f51c7bcee7ca65b53ecfd2d889c1373888d6927' 
  AND token = 'KOs7tzB02bQ7jiedo+qXyO80qCFQHTU64nIxxsXZ1BE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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