Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bfeeee6d3c844a44574d0369505a5cd5eb2ee902d4ca8f3536c8fd934128229f' 
  AND token = '8++6eBin0sr6zGsohQiSO8249fqI1Y2NXeH7GEImMP4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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