Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '243ee0217799bb0a27e762dc3eabdc39c23fb09c6ad2aafecc6d12b73f79bdb6' 
  AND token = '8DrqX2jtcX7usa/QusSi1AKM1z9AS4e0JiqQ/TprDXg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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