Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ce0bfdd780fe139e998aa54769c92b8a940a28562d3e4afe008db5f381a2ab59' 
  AND token = 'tIRITKwbp8Z70x7CXGKCqwVvtPmmogvuvgdHF5ER4xI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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