Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'c76c189edef438029131f62cd152f0dcd9a7244ce811d5e68eed59dd1cffdba3' 
  AND token = 'p8sjv1SowN+Bz9AUehxNjaL39W6foqMKF7PFh8LPhXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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