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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a9badbf5cb97a12ae9b4c8134f7ff77222d055c22df9faddc353b790cf782985' 
  AND token = 'uksdNr0EUH75psnJ4Y678kWwrxmNrAyFLng8O5D9M9A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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