Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd8f29c4e168fa3cf9c5c48e335077ef9fad9cb0437cdaee4d0d9b2a6ab9762c' 
  AND token = '7DeHMGsPdiiDZJDUoMlSuHV8wTh05LBlKRjJ6Zuch5w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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