Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ea9fb40765500b2335a0944cf582e86cd8ec15b86dd4c22b0641b7846bbcb8ea' 
  AND token = 'Iv61hNosb/AV5umn75680P0eHfb5ubnw4HnDQyI9rwE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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