Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'fa740d3c50ad548146713ad694c6b38353f6e06a14cdc8a0f0b888423a1df690' 
  AND token = 'ExngdilY6C5VBcNkNetXN9WJ8lGCf5Z5nr5+716ccYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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