Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5bf83438e1d1d574c981c2d80479368e1356a0d2dd9870b62bc8c4e31f6cae81' 
  AND token = 'ESUW4A6/JgWAfLcNxXslEKoSKMjH3/2Yup++b1Y0pXI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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