Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ab6b2c32ad650fe9f9a7b7074b0f1686f0c8f62383ca9010ea0559650126a39f' 
  AND token = '9T1qseNmcjsMrPIC5Rz9t7ZZr/JZEy3m2r5A/i8WV3M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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