SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '663c758643972309c69299f4a10385771619a5f6b9bbae950e1118e48a211415' 
  AND token = 'Bxg+o1yHzGbA8WGFLVFV5UEAS1Oqq/twsBD92lDtmGw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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