Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0fb0e17f8571eda40777888dd3ece2bfc21716cea86b60b63dd22b628462cba6' 
  AND token = 'l1Ca9MZj35C++SpzEG0azvEC8yUhr5oh+PHIokgJe9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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