Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '20c96fbc34cd38a5c8f9ddb7affe37516d823b4d51f2d650d40138d80360eff8' 
  AND token = '+hPRGFF5oR/PPlKBhYRVgNDdBIbX3vdn76vPRrBUcrs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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