Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8adb1e3526ccd927b2e325e90a56c026cb63d472d864eababee865ff79d02e73' 
  AND token = '8e5Eow+EUNUMtsjyPqN3HLZ96yTvWmaDlOFdEP7QVjI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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