Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5e313804bb1632dfec6a9e5660f666430ca33dd9889ab5176a910a5484ee6a86' 
  AND token = 'drCYxGpTaaYVdlPSGh/SS5EpW30waAYf5XlG6p9Usg0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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