SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dadab2f656f33615d9df9b70f57c3508545cc5e3ad6283d17121b98b1657351f' 
  AND token = 'GN6EYD9spB8L/uIXsQpRCIZR9HDEJ5/Sxgs3b/cxVhQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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