Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a05c619395b8a7eb3c1d441d72e1f4494b2c63290081e66ddfde3b9baabfd16' 
  AND token = 'n+BB5K0Gf1mW0DXsV8EfOT0SE/KBil9IDiK/MvhOf4U=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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