Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3b821b7c80f8a306473c934d84c52cbb2c3ccbf8ee9248652d9a77a3e94c3e5f' 
  AND token = 'Go3M5uTuj0Ia3MYZxM/FYG5jlbyguDc7/xvJREU4sww=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00070

JSON explain

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