Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '78b18d9a58b7fa95598097454975c23d3a500f4e534661efa117ae439e035896' 
  AND token = 'LWsioLn+OmMKa3cVR0u0t+AySt78Yf8RQTi2RPZ8500=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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