Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '4a424e1a8d9f81ebc758d81057f853838f25626ca2f6a0afc9effc802bfcfc3a' 
  AND token = 'jWcxpx5zzeat4K8sAEw35dh2Mga5MB4ffwPYasCMRNA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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