Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '20e518d9d86384a03585c654ec33a33fb61fd471496a53760b217056b7c27322' 
  AND token = 'kFfj6imhjFhQw72Cek7coWrixxn/jBlkAaWaIB55Tj0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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