Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'aab8a38cbaa48f9857a0961f85fdd86a99a8082da6cef692d1425fef903e35a6' 
  AND token = '86VUOp9/L7JTN8Vci+vY5DXfX36Xr2AGAOeuTqSHk9k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00047

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}