Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a9f4870318cc750e070ba0232930becebf207366b7c07b30b7eb2c15cbdb022' 
  AND token = 'JXSxW0ej2g1zlAoWYIN3XkfkWpfCHxlKaMe533Lrw2U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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