Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cacc1f3130fb8c91d6a5e784a222e44359fde6a1ceb45da29b61935e125bdc11' 
  AND token = '3xrT9ISaCJlnmFeMKnj403yzaCFgkTlJ84RU9DWQchU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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