Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6d6a6a73683f3ab47e2ee5334d524e8556d0a237e49a007aa459ae511db2d0de' 
  AND token = 'dd8QXDmC3hOsJNMUoKtzF2GwuCihv7vKZKCOhcYylng=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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