Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '877369ff312a3e8701f3857803c0ea7c0547dc91be6ccbc590b06b99a11cb62d' 
  AND token = '6edULA6d41HUi4EjJcw2luWfIACJqtzpIOe6Nj9hcdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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