Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '12f9bdc1e36193edc90fdd006149422f24c3184a3c9abc095bc26cdc394ce7cd' 
  AND token = 'Be/3nt6ZNaAIZpHlNSVXdsPkE+DLecsYvPzyuh5uR/k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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