Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '7692ec0acf2e770ba873a961e8825acbba88513ca7b69bcca292e6e2cc429f82' 
  AND token = 'C/dEAnIHftpS279ZyL17Yzc+8gi394ec4AJankmts3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00061

JSON explain

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