Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5390cc8ca0d3f24df96403c725bbb976b2a68dbd81ed5386294c60eb4c3586e5' 
  AND token = 'obN4u0bQdUkj4mdgAQu2/Yyiu9OLhwh4wkPM4zABDXk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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