Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ca2450bc247569dbd8d5e301b6e7204d247784f0b7f07e5a13d1291e3d512807' 
  AND token = 'LfLPT0Bz3WQ65h/mSJQR/vNa96dpSkqAIvqp48wMvdo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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